Korean War Begins North Korea invades South Korea with 135,000 men.
President Truman Deploys 7th Fleet President Truman deploys 7th Fleet to Taiwan to prevent the spread of the conflict in Korea to other Far East nations.
First Air Combat Victory A 68th All-Weather Squadron F-82 shoots down a North Korean Yak fighter. Two more enemy planes are destroyed in this air battle.
5th Air Force Bombs Pyongyang 5th AF’s 3rd Bombardment Group sends 18 B-26 Invader light bombers against Heijo Airfield near North Korean capital of Pyongyang: 25 enemy aircraft are destroyed on the ground; one Yak fighter is shot down.
1st U.S. Infantry Unit Arrives 1st Battalion, 21st Infantry Regiment, 24th Infantry Division. Along with Battery A of the 52nd Field Artillery Battalion, comprises Task Force Smith.
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.
Army establishes MASH Units Fifty-seven Army nurses arrive in Pusan. They helped establish a hospital for the wounded. Two days later, on July 8, twelve Army nurses moved forward with a Mobile Army Surgical Hospital (MASH) to Taejon.
Start of Defense of Pusan Perimeter Goes until September 16 in which, 84,478 U.S. troops participate in the defense of Pusan, including the U.S. Army’s 1st Cavalry Division, 2nd, 24th, and 25th Infantry Divisions, and the 1st Provisional Marine Brigade.
Inchon Landing and Liberation of Seoul Operation Chromite. U.S. and allied forces land troops at Inchon. The operation ends with the recapture of Seoul on September 27.
Pusan Perimeter Breakout Eighth U.S. Army breaks out of the Pusan Perimeter. Four U.S. divisions (1st Cavalry Division, 2nd, 24th, and 25th Infantry Divisions) participate, advancing north to meet up with the encircling Marines who landed at Inchon.
First Jet-Powered Combat in History
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 paratroopers of the 187th Airborne Regimental Combat Team (RCT) at Sukch’on and Sunch’on north of Pyongyang. One trooper killed, 36 injured. Paratroopers, in association with ground forces driving north, kill or capture about 6,000 North Koreans.
Chinese Communist Forces (CCF) launch First Phase Offensive Chinese forces fight Republic of Korea (ROK) troops less than four miles south of the Yalu River.
Far East Air Force B-29s and Navy Aircraft attack Yalu River Bridges The attack was designed to isolate the battlefield and cut of the North Korean’s supply routes.
CCF Counter-Offensive in North Korea Seven U.S. divisions (1st Marine Division, 1st Cavalry Division, 2nd, 3rd, 7th, 24th, and 25th Infantry Divisions) participate, incurring heavy loses and were forced to move back down the Korean Peninsula.
Battle of Changjin (Chosin) Reservoir The encircled 1st Marine Division fights its way southward from the Chosin Reservoir to the port city of Hungnam.
Hungnam Operation Complete The U.S. Navy evacuates 105,000 U.S. and ROK forces.
CCF Third Phase Begins 500,000 Communist Chinese Forces push U.N. troops 50 miles south of the 38th Parallel and recapture Seoul.
Start of Siege of Wonsan Task Force 95(U.N. Blockade and Escort Force) blockades Wonsan Harbor. An unprecedented 861 day naval operation—it is the longest effective siege of a port in U.S. Navy history.
Start of Operation Ripper (Through April 4, 1951) U.N troops drive the Communist forces back to the 38th Parallel and retake Seoul.
Start of Operation Tomahawk 120 C-119s and C-46s drop 3,437 paratroopers of the 187th Regimental Combat Team near Munsan-ni in the second largest airborne operation of the war.
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.
CCF First Spring Offensive Largest single battle of the Korean War. CCF launch their Spring Offensive with 250,000 men in 27 divisions. Five U.S. Army divisions (2nd,3rd,7th,24th,25th) participate.
CCF Second Spring Offensive Four U.S. divisions (U.S Army’s 2nd, 3rd, 25th Infantry Divisions and the 1st Marine Division) participate.
Start of Operation Strangle Massive all-out air interdiction campaign is carred out by the Far East Air Force(FEAF), Task Force 77 and the 1st Marine Aircraft Wing(MAW).
Battle of Punchbowl Near Hwach’on Reservoir the 1st Marine Division encounters heavy North Korean resistance, succeeds in taking its objective.
Truce Talks Begin Starting out slowly, the armistice negotiations begin at Kaesong.
Battle of Bloody Ridge (Hill 983) The 15th Field Artillery Battalion sets a record by firing 14,425 rounds in 24 hours.
Battle of Heartbreak Ridge (Hill 931) The 2nd Infantry Division seizes Heartbreak Ridge.
Start of Operation Summit A contigent of 228 Marines is lifted by 12 Sikorsky S-55s in the first helicopter deployment of a combat unit.
Negotiation & Agreement of 38th Parallel The 38th Parallel is agreed by the two sides as the line of demarcation and almost immediately military operations slowed down. No progress was made on other issues so the line became invalidated after 30 days.
Start of Operation Counter The 45th Infantry Division launches a two-phased series of attacks to establish 11 patrol bases in the Old Baldy area. The 2nd and 3rd Battalions, 180th Infantry Regiment, fight fiercely for Outpost Eerie on Hill 191, which is counterattacked by two Chinese battalions.
Battle of Old Baldy (Hill 266) A series of five engagements for Hill 266 in west-central Korea. U.N. forces included a Colombian battalion. The only Latin American country represented in the War.
FEAF and Navy Aircraft Cripple North Korean Power Grid Far East Air Force and Navy planes launch massive air strikes against North Korean’s hydroelectric power grid, causing an almost complete blackout for more than two weeks. Results of strikes extend into northeast China, which loses nearly 25% of its electrical requirements.
Battle of Bunker Hill First major Marine ground action in western Korea is fought by the 1st Marine Division.
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.
Largest All-Navy Raid A total of 144 planes from three carriers destroy the oil refinery at Aoji, North Korea.
Outpost Kelly Beseiged by CCF The 65th Infantry Regiment, the Puerto Rican regiment,(3rd Division) is besieged by Communist forces.
Start of Operation Showdown (Battle of Hill 598/Sniper's Ridge) The 7th Infantry Division battles the Chinese near Kumhwa, the right leg of the Iron Triangle in central Korea.
Battle of T-Bone Hill 38th Infantry Regiment (2nd Infantry Division) repels Chinese forces during an intense battle.
Start of Operation Smack Assault on Spud Hill by elements of the 31st Infantry Regiment (7th Infantry Division).
CCF Attack Nevada Cities Outpost's Regiment Vegas-Reno-Carson Outposts held by 5th Marine Regiment come under heavy attack. A Chinese regiment is destroyed.
Battle of Pork Chop Hill The 17th and 31st Infantry Regiments (7th Division) were hit hard and suffer heavy casualties.
Start of Operation Little Switch The exchange of sick and wounded POWs, including 149 Americans.
Raid on Toksan Dam A dramatic strike by F-84s of 58th Fighter-Bomber Wing destroys a major irrigation system. Five miles of valuable rice crops and miles of highways and railroad tracks are destroyed. Further attacks on irrigation dams follow over the next two weeks.
Navy & Marine Corps Aircraft Fly 910 Sorties This was the highest combined number for a single day.
FEAF Sabres Destroy 16 MiGs The largest number shot down in one day.
Battle of Kumsong River Salient Last Communist offensive. Chinese Communist Forces launch a six division attack partly directed at the U.S. IX Corps (3rd, 40th, 45th Infantry Divisions). The 187th RCT is attached to 2nd Infantry Division during the fighting.
Battle of Pork Chop Hill The 7th Infantry Division is ordered to evacuate its defensive positions after five days of fighting.
Final U.S. Ground Combat Heavy enemy (3,000 men) attack is launched in the Berlin Complex area held by the 1st and 7th Marine Regiments. Last Marine ground actions of the War are fought on Hills 111 and 119.
Last Air Combat F-86 pilot downs an enemy transport near the Manchurian border.
Signing of Armistice The United States, North Korea, and China sign an armistice which ends the War but fails to bring about a permanent peace.