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Timeline of Korean War Events

TimelinePhase I Phase II Phase III Phase IV PHase V Phase VI Phase VII PHase VIII Phase IX Phase X

Battles/Important Events of The Korean War Dates of Battles/Events
North Korea invades South Korea with 135,000 men, initiating the Korean War. June 25, 1950
Destroyers USS Mansfield and USS De Haven help evacuate 700 Americans and friendly foreign nationals from Inchon, South Korea. June 26, 1950
33 officers and men of Detachment X of the 507th Antiaircraft Artillery Battalion deploy from Japan to protect Suwon Airfield.  They are the first U.S. ground troops in Korea. June 29, 1950
Near Samchock, South Korea, light cruiser USS Juneau conducts the first naval gunfire mission of the war. June 29, 1950
U.N. Defensive (Phase I)  June 27 - December 15, 1950
President Harry S. Truman deploys the 7th Fleet to the waters off Taiwan to prevent the spread of the conflict in Korea to other Far East waters. June 27, 1950
First air victory of the war.  A 68th All-Weather Squadron F-82 shoots down North Korean Yak fighter. (Two enemy planes are destroyed in this battle). June 27, 1950
Fifth Air Force's 3rd Bombardment Group sends 18 B-26 Invader light bombers against Heijo Airfield near the North Korean capital of Pyongyang: 25 aircraft are destroyed on the ground; one Yak fighter is shot down. June 29, 1950
First U.S. infantry unit arrives in Korea:  Two reinforced rifle companies of the 1st Battalion, 21st Infantry Regiment, 24th Infantry Division.  Along with Battery A of the 52nd Field Artillery Battalion, it comprises Task Force Smith. July 1, 1950
Off Chumunjin, on Korea's east coast, the USS Juneau, HMS Jamaica and HMS Black Swan destroy three of four attacking North Korean torpedo boats. July 2, 1950
General Douglas MacArthur, Commander in Chief, Far East (CinCFE) requests the immediate dispatch of a Marine Corps Regimental Combat Team with its own air support for immediate duty in Korea. July 2, 1950
In the vicinity of Pyongyang, Navy fighters of Fighter Squadron 51 shoot down two North Korean YAK-9s, naval aviation's first kills of the Korean War. July 3, 1950
Battle of Osan.  First U.S. ground action of the war: Task Force Smith (406 infantrymen and 134 artillerymen) engages and delays advancing North Korean People's Army (NKPA) units. July 5, 1950
Fifty-seven nurses arrive in Pusan, Korea.  They helped establish a hospital for the wounded.  Two days later, on July 8, 12 Army nurses moved forward with a mobile Army surgical hospital (MASH) to Taejon. July 6, 1950
The Security Council of the United Nations passes a resolution recommending a unified command in Korea and asking the United States to name the commander. July 7, 1950
The First Provisional Marine Brigade is activated at Camp Pendleton, California under the command of Brigadier General Edward A. Craig, USMC.  The basic components of the 6,500-man brigade are the 5th Marines; 1st Battalion, 11th Marines; and the Marine Aircraft Group 33 (MAG-33).  The Brigade subsequently arrives 2 August at Pusan, Korea. July 7, 1950
President Truman designates the CINC/Far East Command, General of the Army Douglas MacArthur, as the commander of the United Nations Command. July 8, 1950
Sailors and Marines from USS Juneau land near Kashin, North Korea and destroy a railroad tunnel with explosives. July 11, 1950
President Rhee places all ROK forces under operational control of CINC/United Nations Command. July 14, 1950
President Harry S. Truman authorizes the Department of Defense to call up reserve units and individual reservists.  On the following day (July 20, 1950), the Commandant of the Marine Corps, General Clifton B. Cates, orders organized Marine Corps ground reserve units to active duty, alont with a partial call up of Marine air reservists and squadrons. July 19, 1950
Battle of Taejon.  KPA defeats 24th Infantry Division and captures town. July 19-20, 1950
The Commandant of the Marine Corps directs that the entire 1st Marine Division be brought to full war-time strength and embark between August 10-15 for duty in Korea.  Marine aviation elements in the Far East were also increased from a single group to a wing. July 25, 1950
General Walker orders Eighth Army to withdraw behind Naktong River and form the Pusan perimeter. August 1, 1950
More than 9,000 officers and enlisted men of the 2nd Marine Division and newly activated Marine Corps reserve units arrive at Camp Pendleton to reinforce units of the 1st Marine Division. August 1-5, 1950
The first Marine Corps aviation missions against North Korea are flown from the USS Sicily by Corsairs from Marine Fighter Squadron 214 (VMF-214). August 3, 1950
Marine Corps helicopters from the Marine Observation Squadron Six (VMO-6) undertake the first air evacuation of Marine casualties in Korea. August 4, 1950
General MacArthur orders Eighth Army to implement the Korean Augmentation to the United States Army (KATUSA) program. August 15, 1950
A total of 84,478 U.S. troops participate in the defense of the Pusan Perimeter including the U.S. Army's 1st Cavalry Division, 2nd, 24th, and 25th Infantry Divisions and the 1st Provisional Marine Brigade. August 4 - September 16, 1950
The first Marine aviation missions to be flown from the Badoeng Strait against North Korean targets are led by Corsairs from Marine Fighter Squadron 323 (VMF-323). August 6, 1950
The First Provisional Marine Brigade is engaged in heavy combat operations against North Korean forces near Chinju. August 7-13, 1950
The Marine Brigade opens the battle for "No Name Ridge," leading the way to the destruction of an enemy bridgehead at Naktong. August 17, 1950
North Korean forces fail to break the United Nations perimeter defense at Pusan.  In the Second Battle of Naktong, the First Provisional Marine Brigade counterattacks and contains the enemy west of Yongsan. September 1-5, 1950
The First Provisional Marine Brigade is deactivated and absorbed by the First Marine Division for the upcoming Inchon operation. September 13, 1950
Vice Admiral Arthur D. Struble's Task Force 7 composed of 230 U.S. and other UN warships, conducts three days of pre-landing bombardment missions around the port of Inchon. September 13-15, 1950
USS Missouri shells targets near Samchok, the first bombardment mission by one of the four U.S. battleships that eventually serve in the war. September 14, 1950
Inchon landing (Operation CHROMITE).  U.S. and allied forces land U.S. Marines of the 1st Marine Division (under Major General Oliver P. Smith) at Inchon. September 15, 1950
Inchon Operation and Liberation of Seoul.  U.S. and allies re-capture Seoul on September 27, after intense house to house fighting. September 15 - October 7, 1950
U.N. Offensive (Phase II)  September 16 - November 2, 1950
Pusan Perimeter Breakout.  Eighth U.S. Army (EUSA) breaks out of the Pusan Perimeter.  Four U.S. divisions (1st Cavalry, 2nd, 24th and 25th Infantry Divisions) participate. September 16-27, 1950
ROK units cross the 38th Parallel. September 30, 1950
American units cross the 38th Parallel. October 7, 1950
Pyongyang captured by ROK 1st Division and U.S. 1st Cavalry Division. October 20, 1950
War's first airborne operation.  Seventy-one C-119s and 40 C-47s of the Far East Air Force's (FEAF) Combat Cargo Command drop 2,860 paratoopers of the 187th Airborne Regimental Combat Team (RCT) at Sukch'on and Sunch'on north of Pyongyang.  One trooper killed and 36 injured in one jump.  Paratroopers in association with ground forces driving north, kill or capture about 6,000 North Koreans during this operation, however the operation is considered a failure in that it did not rescue any POWs or capture any high-value DPRK officials as intended. October 20, 1950
CCF Intervention (Phase III)  November 3, 1950 - January 24, 1951
Chinese Communist Forces (CCF) launch their first phase offensive. October 25, 1950
The 1st Marine Division makes an unopposed landing at Wonsan, on Korea's east coast to begin operations in Northeast Korea, and establish security for the port of Wonsan.  When joined by other units, the Marines will move northward toward the Manchurian border. October 26, 1950
First U.S. battle with Chinese Communist Forces (CCF) near Unsan left 8th Cavalry Regiment ineffective. November 1-2, 1950
The 7th Marines encounter and defeat Chinese Communist Forces in four days of fierce fighting at Sudong.  The Chinese break contact and retreat northward. November 3-7, 1950
First all-jet combat in history.  An F-80 Shooting Star of the 51st Fighter Interceptor Wing shoots down a MiG-15 fighter near Sinjiju in a 30-second dog fight November 8, 1950
 FEAF B-29s and Navy aircraft attack Yalu River bridges in an attempt to isolate the battlefield   November 8-26, 1950 
 In the first jet-vs-jet combat in U.S. naval history, Lieutenant Commander William T. Amen's F9F Panther of Fighter Squadron 111 shoots down a Chinese MiG-15.  November 9, 1950
 Units of the 1st Marine Division reach Hagaru-ri at the southern tip of the Chosen Reservoir.  November 15, 1950
CCF Counteroffensive in North Korea.  Seven U.S. divisions participate (1st Marine Division, U.S. Army's 1st Cavalry Division, 2nd, 3rd, 7th, 24th and 25th Infantry Divisions). November 25 - December 15, 1950
Battle of the Changijin (Chosin) Reservoir.  The encircled 1st Marine Division and elements of the U.S. Army's 7th Infantry Division, with support of Navy and Marine aircraft, fight their way southward from the Chosin Reservoir to the port city of Hungnam.  The withdraw occurs along 78 miles of mountain road in freezing conditions.  Although, suffering more than 4,000 battle casualties and uncounted cases of frostbite, the 1st Marine Division and supporting units inflict an estimated 25,000 casualties on the attacking Chinese Communist Forces. November 27 - December 15, 1950 
General MacArthur orders Eighth Army to withdraw to avoid encirlement and orders X Corps to concentrate in the Hamhung-Hungnam coastal area. November 28, 1950
2nd Infantry Division passes through the Kunu-ri "Gauntlet" while withdrawing after the Battle of the Ch'ongch'on River.  One-third of the division is killed, wounded or missing. November 30 - December 1, 1950
Lieutenant (jg) Thomas J. Hudner crash-lands his F4U Corsair in the mountains of North Korea in an unsuccessful attempt to save the life of Ensign Jesse L. Brown, the first African American naval aviator.  President Truman later awards Hudner the Medal of Honor. December 4, 1950
LTG Walton Walker, the Commanding General of the Eighth U.S. Army, is killed in a vehicle accident. December 23, 1950
Eighth Army establishes defensive positions around Seoul. December 23, 1950
The U.S. Navy evacuates 105,000 American, South Korean and allied troops, 91,000 civilian refugees and 350,000 tons of equipment and supplies from Hungnam, North Korea to Pusan, South Korea. November 10 - December 24, 1950
LTG Matthew Ridgway arrives in Korea as 8th Army Commander to replace LTG Walker. December 26, 1950
Third Battle of Seoul results in the loss of the city to communist forces. December 31, 1950 - January 7, 1951
Third Phase CCF Offensive: 500,000 enemy troops push U.N. forces 50 miles south of the 38th Parallel and recapture Seoul. December 31, 1950 - January 8, 1951
Communist forces capture Seoul. Jaunary 4, 1951
First U.N. Counteroffensive (Phase IV)  January 25 - April 21, 1951
The 1st Marine Division participates in routing enemy guerilla forces in the Masan-Pohang-Sondong-Andong areas. January 12 - February 15, 1951
Operation WOLFHOUND, a reconnaissance in force along with the follow-on operaton, Operation THUNDERBOLT convince LTG Matthew Ridgway by the end of January to begin a slow, carefully controlled counter-offensive using "meat grinder" tactics. January 25, 1951
Battle of the Twin Tunnels.  The 23rd Infantry Regiment (2nd Infantry Division), French Battalion and the 37th Field Artillery Battalion confront several CCF regiments, killing at least 1,300 Chinese. February 1, 1951
Fourth Phase CCF Offensive. February 11-19, 1951
Battle of Chipyong-ni. A mass assault (8,000 troops) by the CCF is contained by 23rd Regimental Combat Team (2nd Infantry Division) and French Battalion. February 13-15, 1951
Seige of Wonsan.  Task Force 95 (U.N. Blockade and Escort Force) blockades Wonsan Harbor.  The seige is an unprecedented 861-day naval operation; the longest effective siege of a port in U.S. Navy history. February 16, 1951 - July 27, 1953
Elements of the 1st Marine Division participate in Operation KILLER, a general limited objective advance by U.S. IX and X Corps. February 21, 1951
Eighth Army mounts first major raids into North Korea using North Korean partisans. March 1951
Operation RIPPER.  U.S. forces drive the Communists back to the 38th Parallel and retakes Seoul.  Seven U.S. divisions participate (the U.S. Army's 1st Cavalry Division, 2nd, 3rd, 7th, 24th and 25th Infantry Divisions and the 1st Marine Division) March 7-31, 1951
UN forces retake Seoul. March 14, 1951
Operation TOMAHAWK (Munsan-ni).  One-hundred twenty C-119s and C46s drop 3,437 paratroopers of the 187th Regimental Combat Team near Munsan-ni in second largest airborne operation of the war. March 23, 1951
Operations RUGGED and DAUNTLESS take Eighth Army line slightly north of the 38th parallel, where it prepares to defend against the expected enemy offensive. April 1-21, 1951
The 1st Marine Division advances north to the Hwachon Reservoir.  On the following day, Chinese Communist Forces launch an all-out "Spring Offensive."  The Marines halt the Chinese breakthrough of IX Corps, and by 27 April, the situation is stablized. April 1-21, 1951
President Truman relieves General MacArthur for insubordination and replaces him with General Ridgway.  LTG James A. Van Fleet, the Commanding General of Second Army, is assigned as the new commander of Eighth Army. April 11, 1951
War's first major aerial duel.  More than 40 MiG-15s attack a B-29 formation, shooting down two bombers.  Eleven of the MiGs are destroyed, seven by B-29 gunners. April 12, 1951
CCF Spring Offensive (Phase V)  April 22 - July 8, 1951
CCF First spring offensive.  Largest single battle of the Korean War.  CCF laungh their Spring Offensive with 250,000 men in 27 divisions.  Five U.S. Army divisions (2nd, 3rd, 7th, 24th and 25th) and the 1st Marine Division participate. April 22-29, 1951
Battle of Imjin River (Gloster Hill).  The 29th Infantry Brigade (UK) slows Chinese advances until further U.N. forces are able to blunt the Chinese offensive.  A particularly notable stand is made by the 1st Battalion of the Glouscestershire Regiment on Hill 235 which becomes known as "Gloster Hill."  The actions serve to protect the U.N. and prevent a Chinese advance on Seoul. April 22-25, 1951
Battle of Kapyong.  The 27th British Commonwealth Brigade composed largely of Australian and Candian forces slows Chinese advances until further U.N. forces can successfully blunt the Chinese offensive.  The actions serves to protect the U.N. and prevents a Chinese advance on Seoul. April 22-25, 1951
CCF offensive is stopped north of Seoul. April 30, 1951
In one of the most unique operations of the wary, Navy Task Force 77 carrier aircraft attack and breach the Hwachon Dam with torpedoes.  The resulting flooding of the Han and Pukhan River valleys works to the benefit of the U.S. and UN troops fighting in the area. May 1, 1951
1st Marine Aircraft Wing (1st MAW) participates in a Fifth Air Force (FAF) 300-plane strike on Sinuiju, near the Yalu River.  It is the biggest raid of the conflict. May 9, 1951
General Ridgway formally requests authority to abolish racial segregation in Far East Command. May 14, 1951
CCF Second Spring Offensive.  Four U.S. divisions (U.S. Army's 2nd, 3rd, and 25th Infantry Divisions, and the 1st Marine Division) participate. May 15-20, 1951
Eighth Army counterattacks and pushes the enemy north of the 38th parallel. May 20 - June 10, 1951
Operation STRANGLE.  Massive all-out air interdiction campaign  is carried out by FEAF, TF 77, and the 1st Marine Aircraft Wing (MAW) against Communist trains, trucks, supply centers and ammunition dumps in an unsuccessful attempt to deny logistic support to enemy frontline troops. May 20 - September 20, 1951
Battle for the Punchbowl.  The 1st Marine Division advances northeast of the Hwach'on Reservoir and encounters heavy North Korean resistance, but succeeds in taking its objective, a ridgeline overlooking a deep circular valley nicknamed the "Punchbowl." June 1-20, 1951
U.N. Summer-Fall Offensive (Phase VI)  July 9 - November 27, 1951
Battle of Bloody Ridge (Hill 983).  The 15th Field Artillery Battalion sets a record by firing 14,425 rounds in 24 hours. August 18 - September 5, 1951
Following the breakdwon of truce negotiations, United Nations forces assume the offensive.  The 1st Marine Division is ordered to take the rest of the "Punchbowl."  This results in more than two weeks of heavy fighting.  By September 18, the Marines manage to advance to the Soyang River northeast of the Punchbowl. August 31 - September 18, 1951
Battle of Heartbreak Ridge (Hill 931).  The 2nd Infantry Division seizes Heartbreak Ridge. September 13 - October 15, 1951
Operation SUMMIT.  A company of 224 fully-equipped Marines and 17,772 lbs of cargo is lifted by 12 HRS-1 Sikorsky S-55s of Marine Helicopter Squadron 161 (HMR-161) in the Punchbowl area.  This marks the first helicopter combat deployment of a combat unit. September 21, 1951
Operation COMMANDO, large offensive taken by the U.S. I Corps, the 1st British Commonwealth Division and the 1st ROK Division, seized the Jamestown Line, inflicting heavy casualties on Chinese forces.  The action was the last major action in the "war of maneuver" before the war became largely static. October 3-19, 1951
Aircraft from carrier USS Essex, exploiting intelligence information, attack an enemy headquarters compound near Kapsan, North Korea, killing hundreds of enemy commanders and staff officers. October 29, 1951
Marine Helicopter Squadron 161 (HMR-161) conducts the first frontline relief of a Marine battalion during Operation SWITCH. November 11, 1951
General Ridgway orders LTG Van Fleet to have Eighth Army assume an "active defense." November 12, 1951
Korean War truce talks began July 10, 1951.  Although the talks started slowly, on November 27, 1951, the two sides agreed on the 38th parallel as a line of demarcation.  U.N. forces undertook no major offensive operations for the remainder of the war. July 10 - November 27, 1951
Second Korean Winter (Phase VII)  November 28, 1951 - April 30, 1952
In a rare air battle with Communist bombers, 31 Sabres knock down eight Tu-2 bombers, three La-9 propeller-driven fighters, and one MiG-15. November 30, 1951
FEC establishes the Combined Command for Reconnaissance Activities, Korea, 8240th AU, to coordinate the partisan and intelligence operations behind enemy lines. December 1951
40th and 45th Infantry Divisions (California National Guard and Oklahoma National Guard, respectively) replace 24th Infantry and 1st Cavalry Divisions.  The latter two divisions return to Japan. December 1951 - February 1952
The 1st Marine Division is moved from the "Punchbowl" area to a line on the western front on the left flank of the U.S. Eighth Army and becomes part of I Corps. March 23-25, 1952
Korean Summer-Fall (Continuing Stalemate) 1952 (Phase VIII)  May 1 - November 30, 1952
General Matthew Ridgway is appointed Supreme Allied Commander Europe (SACEUR), replacing General Dwight Eisenhower, who would go on to become the 34th President of the United States. May 1, 1952
Koje-do prison uprising begins. May 7, 1952
General Mark Clark assumes command of U.N. forces in Korea. May 12, 1952
Operation COUNTER.  The 45th Infantry Division launches a two-phased series of attacks to establish 11 patrol bases in the Old Baldy area.  Second and 34d Battalions, 180th Infantry Regiment, fight fiercely for Outpost Eerie on Hill 191, which is counterattacked by two Chinese battalions. June 6-14, 1952
Navy, Air Force and Marine aircraft conduct a series of attacks that heavily damage North Korea's vital hydroelectric dams and related facilities at Suiho and other sites on the Yalu River between North Korea and the People's Repbulic of China.  The attacks knock out North Korea's power grid for two weeks. June 23-26, 1952
First Battle for Old Baldy (Hill 266) fought by the 2nd Infantry Divison.  The battle marks the start of the communist tactic of attacking Eighth Army's outpost line of resistance in order to inflict casualties.  The Objective is to pressure UN armistice negotiators and is the communist response to the UNC air pressure campaign against North Korea. July 17 - August 4, 1952
Battle of Bunker Hill (Hill 122).  First major Marine ground action in western Korea is fought by the 1st Marine Division. August 9-16/September 5-15, 1952
War's largest air raid.  FEAF and carrier planes bomb Pyongyang in a 1,403-sortie assault - the largest single-day raid of the war. August 29, 1952
Largest all-Navy raid.  A total of 144 planes from three carriers destroy the oil refinery at Aoji, North Korea September 1, 1952
Outpost Kelly.  The 65th Infantry Regiment (3rd Infantry Division) is beseiged by CCF.  The 65th Regiment failed to hold Outpost Kelly in the midst of aggressive Chinese assaults and firepower.  Due to racist sentiments at the time, the failure was largely blamed on the fact that the 65th Infantry Regiment was a predominantly Puerto Rican unit. September 17-24, 1952
The Battle for White Horse Hill.  ROK 9th Division holds outpost with aid of massive American fire support against repeated attacks from nine Chinese regiments.  Important as a sign of the ROK Army's improvement. October 6-15, 1952
In "Cherokee" Strikes, so named because of the Native American ancestory of Seventh Fleet Commander Vice Admiral Joseph J. Clark, Navy and Marine aircraft conduct a bombing campaign against battlefront enemy supply facilities.  They attack supply ammo and fuel depots within miles of the 38th parallel and communist frontline positions.  The strikes continue until the end of the war. October 9, 1952 - July 27, 1953
Operation SHOWDOWN/Battle of Hill 598 (Sniper Ridge).  7th Infantry Division battles the Chinese near Kumhwa, the right leg of the Iron Triangle. The operation is a failure and the UNC never allowed Eighth Army to undertake a similar sized offensive for the remainder of the war October 14-25, 1952
The 7th Marines encounter stiff enemy opposition during the Battle for the "Hook", a critical salient in the Main Line of Resistance (MLR). October 26-28, 1952
Jackson Heights.  The 65th Infantry Regiment already much maligned after their failure to hold Outpost Kelly, is ordered to take and hold Jackson Heights (named after CPT George Jackson of George Company).  The Regiment encounters stiff resistance and takes heavy casualties including most of the officers in Able Company.  The failure results in the largest mass court martial of the Korean War.  Ninety-two Puerto Rican Soldiers are court martialed including 1LT Juan Guzman for refusals during combat.  In March of 1953, the unit is integrated and ceases to be a Puerto Rican unit.  The issue with the 65th Infantry Regiment have largely since been found to be due to racial attitudes, senior leadership failures, shortages of NCOs, a self-inflicted language barrier and poor training.  This combination helped to destroy the morale of a unit that had served bravely during the first two years of the war. October 27-28, 1952
Hill 851, Heartbreak Ridge area, held by the 2nd Battalion, 160th Infantry Regiment (40th Infantry Division). November 3, 1952
Third Korean Winter (Phase IX)  December 1, 1952 - April 30, 1953
T-Bone Hill.  The 38th Infantry Regiment (2nd Infantry Division) repels Chinese forces during an intense battle. December 25, 1952
Operation SMACK.  Assault on Spud Hill by elements of the 31st Infantry Regiment (7th Infantry Division) is viewed by war correspondents at the inviation of the 7th Division's Press Officer.  The attack was repulsed and largely described as a disaster by the correspondents in their reports home.  This led to charges of the operation being a publicity stunt, which Army Chief of Staff, General Joseph Lawton Collins adamantly refuted.  January 25, 1953
Hill 355 (Little Gibraltar), held by the 9th Infantry Regiment (2nd Infantry Division), is assaulted by Chinese. March 17, 1953
Old Baldy/Pork Chop Complex.  Held by 31st Infantry Regiment (7th Infantry Division).  The 32nd Regiment (7th Infantry Division) relieves the 31st. March 23-24, 1953
Outposts at the Nevada cities (Reno-Vegas-Carlson), held by the 5th Marine Regiment, come under heavy attack.  A Chinese regiment is destroyed.  Marine casualties total more than 1,000 with Chinese losses estimated to be twice as high. March 26-30, 1953
The 1st Marine Aircraft Wing (1st MAW) flies the first night close air support missions uisng intersecting searchlight beams to mark enemy targets.  The results of this "searchlight-night fighter" team on ground targets are described as "excellent" by ground and air observers. April 12, 1953
Battle of Pork Chop Hill.  The 17th and 31st Infantry Regiments (7th Infantry Division) hit hard and suffer heavy casualties. April 16-18, 1953
Conclusion (Phase X)  May 1 - July 27, 1953
Operation Little Switch exchanges sick and wounded POWs, including 149 Americans April 20-26, 1953
Raid on Toksan Dam.  A dramatic strike by 58th Fighter-Bomber Wing F-84s destroys a major irrigation system.  Five miles of valuable rice crops are scoured and miles of highways and railroad tracks are destroyed.  Further attacks on irrigation dams follow over the next two weeks. May 13, 1953
While truce details are worked out by negotiators, Chinese Communist Forces launch regimental-strenght attacks against the U.S. I Corps sector, with resulting heavy fighting in the Nevada Cities and Hook outposts.  Marine Corps tanks and artillery are utilized in support of the defending units of the U.S. Army's 25th Infantry Division. May 28-30, 1953
USS Princeton launches 184 sorties, establishing a single day Korean War record for offensive sorties flown from a carrier. June 15, 1953
Navy and Marine Corps aircraft fly 910 sorties - the highest combined number for a single day. June 15, 1953
FEAF Sabres Destroy 16 MiGs, the largest number shot down in one day. June 30, 1953
Battle of Pork Chop Hill.  After five days of fighting, The 7th Infantry Division is ordered to evacuate its defensive positions by LTG Maxwell D. Taylor.  Taylor viewed the heavy casualties taken in the defense of Pork Chop Hill as overly "prohibitive" in the face of repeated Chinese assaults. July 6-10, 1953
Combat outposts Berlin and East Berlin, in the 7th Marine Regiment's right sector, come under heavy attack during the Marine relief of the U.S. Army's 25th Infantry Division. July 7-8, 1953
Major John F. Bolt, from the Marine Fighter Squadron 115 (VMF-115) becomes the Marine Corps' first "ace" with kills of his fifth and sixth MiGs. July 11, 1953
Battle of Kumsong River Salient.  Last Communist offensive.  CCF launch a six division attack partly largely directed at ROK forces because of the Republic of Korea's refusal to participate in the peace negotiations.  CCF forces used superior firepower and overwhelming force to break the salient and destroy the elite ROK "White Tiger" regiment.  Fighting continued in the area until the signing of the Armistice on July 27. July 13-27, 1953
Lieutenant Guy P. Bordelon Jr. becomes the Navy's one "ace" of the war when the shore-based naval aviator, in a nighttime engagement, shoots down his fifth enemy plane. July 16, 1953
Final U.S. ground combat.  Heavy enemy (3,000 men) attack is launched in the Berlin Complex ("Boulder City") area held by the 7th and 1st Marine Regiments.  Last Marine ground actions of the war are fought on Hills 111 and 119. July 24-26, 1953
Last air-kill of the war.  F-86 pilot downs an enemy transport near the Manchurian border. July 27, 1953
The United States, North Korea and China sign an armistice, which ends the war but fails to bring about a permanent peace.  To date, the Republic of Korea (South) and Democratic Peoples' Republic of Korea (North) have not signed a peace treaty. July 27, 1953
Operation Big Switch (POW Exchange) August 5 - December 23, 1953