Humanities › History & Culture Timeline of the Korean War America's Forgotten War Share Flipboard Email Print History & Culture Asian History Asian Wars and Battles Basics Figures & Events Southeast Asia East Asia South Asia Middle East Central Asia American History African American History African History Ancient History and Culture European History Genealogy Inventions Latin American History Medieval & Renaissance History Military History The 20th Century Women's History View More By Kallie Szczepanski Kallie Szczepanski History Expert Ph.D., History, Boston University J.D., University of Washington School of Law B.A., History, Western Washington University Dr. Kallie Szczepanski is a history teacher specializing in Asian history and culture. She has taught at the high school and university levels in the U.S. and South Korea. Learn about our Editorial Process Updated on January 29, 2020 At the close of World War II, the victorious Allied Powers did not know what to do with the Korean Peninsula. Korea had been a Japanese colony since the late nineteenth century, so westerners thought the country incapable of self-rule. The Korean people, however, were eager to re-establish an independent nation of Korea. Instead, they ended up with two countries: North and South Korea. Background to the Korean War: July 1945 - June 1950 Potsdam Conference at the end of World War II, between Harry Truman, Josef Stalin and Clement Atlee (1945). Library of Congress Potsdam Conference, Russians invade Manchuria and Korea, US accepts Japanese surrender, North Korean People's Army activated, U.S. withdraws from Korea, Republic of Korea founded, North Korea claims entire peninsula, Secretary of State Acheson puts Korea outside U.S. security cordon, North Korea fires on South, North Korea declares war North Korea's Ground Assault Begins: June - July 1950 UN forces blow up the bridge over the Kum River near Taejon, South Korea, in an attempt to slow North Korean advances. August 6, 1950. Department of Defense / National Archives UN Security Council calls for ceasefire, South Korean President flees Seoul, UN Security Council pledges military help for South Korea, U.S. Air Force shoots down North Korean planes, South Korean Army blows up Han River Bridge, North Korea captures Seoul, First U.S. ground troops arrive, U.S. moves command from Suwon to Taejon, North Korea captures Incheon and Yongdungpo, North Korea defeats U.S. troops north of Osan Lightning-Fast North Korean Advances: July 1950 Last-ditch defense before the Fall of Taejon, South Korea, to North Korean forces. July 21, 1950. National Archives / Truman Presidential Library U.S. troops retreat to Chonan, UN Command under Douglas MacArthur, North Korea executes U.S. POWs, 3rd Battalion overrun at Chochiwon, UN headquarters moved from Taejon to Taegu, US Field Artillery Battalion overrun at Samyo, South Korean President gives ROK military command to UN, North Korean troops enter Taejon and capture Major General William Dean "Stand or Die," South Korea and the UN Hold Busan: July - August 1950 South Korean soldiers try to comfort their wounded comrades, July 28, 1950. National Archives / Truman Presidential Library Battle for Yongdong, Fortification of Jinju, South Korean General Chae killed, Massacre at No Gun Ri, General Walker orders "Stand or die," Battle for Jinju on Korea's south coast, US Medium Tank Battalion arrives at Masan North Korean Advance Grinds to a Bloody Halt: August - September 1950 Refugees stream out of Pohang, on the east coast of South Korea, in the face of North Korean advances. August 12, 1950. National Archives / Truman Presidential Library First Battle of Naktong Bulge, Massacre of U.S. POWs at Waegwan, President Rhee moves government to Busan, US victory at Naktong Bulge, Battle of the Bowling Alley, Busan Perimeter established, Landing at Incheon UN Forces Push Back: September - October 1950 Naval bombardment off the east coast of Korea by U.S.S. Toledo, 1950. National Archives / Truman Presidential Library UN forces breakout from Busan Perimeter, UN troops secure Gimpo Airfield, UN victory in Battle of Busan Perimeter, UN retakes Seoul, UN captures Yosu, South Korean troops cross 38th Parallel into North, General MacArthur demands North Korean surrender, North Koreans murder Americans and South Koreans at Taejon, North Koreans murder civilians in Seoul, U.S. troops push toward Pyongyang China Stirs as UN Takes Most of North Korea: October 1950 Napalm drop on a village in North Korea, January, 1951. Department of Defense / National Archives UN takes Wonsan, Anti-communist North Koreans murdered, China enters war, Pyongyang falls to UN, Twin Tunnels Massacre, 120,000 Chinese troops move to North Korean border, UN pushes to Anju in North Korea, South Korean government executes 62 "collaborators," South Korean troops at Chinese border China Comes to North Korea's Rescue: October 1950 - February 1951 Two concerned Korean children stand in front of a tank in Haeng-ju, Korea during the Korean War. June 9, 1951. Photo by Spencer for Department of Defense / National Archives China joins war, First Phase offensive, US advances to Yalu River, Battle of Chosin Reservoir, UN cease fire declared, General Walker dies and Ridgway assumes command, North Korea and China recapture Seoul, Ridgway Offensive, Battle of Twin Tunnels Hard Fighting, and MacArthur is Ousted: February - May 1951 Mechanics struggle to repair a B-26 bomber during a snowstorm, Korea (1952). Department of Defense / National Archives Battle of Chipyong-ni, Siege of Wonsan Harbor, Operation Ripper, UN retakes Seoul, Operation Tomahawk, MacArthur relieved of command, First big airfight, First Spring Offensive, Second Spring Offensive, Operation Strangle Bloody Battles and Truce Talks: June 1951 - January 1952 Korean officers at the Kaesong Peace Talks, 1951. Department of Defense / National Archives Battle for the Punchbowl, Truce talks at Kaesong, Battle of Heartbreak Ridge, Operation Summit, Peace talks resume, Line of demarcation set, POW lists exchanged, North Korea nixes POW exchange Death and Destruction: February - November 1952 U.S. Marines conduct a memorial service for a fallen comrade, Korea, June 2, 1951. Department of Defense / National Archives Riots at Koje-do prison camp, Operation Counter, Battle for Old Baldy, North Korean power grid blacked out, Battle of Bunker Hill, Largest bombing raid on Pyongyang, Outpost Kelly siege, Operation Showdown, Battle of the Hook, Fight for Hill 851 Final Battles and Armistice: December 1952 - September 1953 U.S. airman reacts to news that a truce has been declared, and the Korean War is (unofficially) over. July, 1953. Department of Defense / National Archives Battle of T-bone Hill, Battle for Hill 355, First Battle of Pork Chop Hill, Operation Little Switch, Panmunjom talks, Second Battle of Pork Chop Hill, Battle of Kumsong River Salient, Armistice signed, POWs repatriated Cite this Article Format mla apa chicago Your Citation Szczepanski, Kallie. "Timeline of the Korean War." ThoughtCo, Apr. 5, 2023, thoughtco.com/timeline-of-the-korean-war-195834. Szczepanski, Kallie. (2023, April 5). Timeline of the Korean War. Retrieved from https://www.thoughtco.com/timeline-of-the-korean-war-195834 Szczepanski, Kallie. "Timeline of the Korean War." ThoughtCo. https://www.thoughtco.com/timeline-of-the-korean-war-195834 (accessed June 7, 2023). copy citation