1951 events in history

Jan 4 Korean War: Chinese and North Korean forces capture Seoul
Jan 6 Korean War: An estimated 200–1,300 South Korean communist sympathizers are slaughtered in what becomes the Ganghwa massacre
Jan 13 First Indochina War: The Battle of Vinh Yen begins, which will end in a major victory for France
Jan 15 Ilse Koch, "The Witch of Buchenwald", wife of the commandant of the Buchenwald concentration camp, is sentenced to life imprisonment by a court in West Germany
Jan 27 Nuclear testing at the Nevada Test Site begins with a one-kiloton bomb dropped on Frenchman Flat
Feb 6 The Broker, a Pennsylvania Railroad passenger train derails near Woodbridge Township, New Jersey. The accident kills 85 people and injures over 500 more. The wreck is one of the worst rail disasters in American history
Feb 7 Korean War: 705 suspected communist sympathizers are butchered by South Korean forces
Feb 9 Korean War: Geochang massacre
Feb 13 Korean War: Battle of Chipyong-ni, which represented the "high-water mark" of the Chinese incursion into South Korea, commences
Feb 25 The first Pan American Games are held in Buenos Aires, Argentina
Feb 27 The Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms, is ratified
Mar 3 Jackie Brenston, with Ike Turner and his band, records "Rocket 88", often cited as "the first rock and roll record", at Sam Phillips' recording studios in Memphis, Tennessee
Mar 6 The trial of Ethel and Julius Rosenberg begins
Mar 7 Korean War: Operation Ripper – United Nations troops led by General Matthew Ridgeway begin an assault against Chinese forces
Mar 14 Korean War: For the second time, United Nations troops recapture Seoul
Mar 20 Fujiyoshida, a city located in Yamanashi Prefecture, Japan, in the center of the Japanese main island of Honshū is founded
Mar 28 First Indochina War: In the Battle of Mao Khe, French Union forces, led by World War II hero Jean de Lattre de Tassigny, inflict a defeat on Việt Minh forces commanded by General Võ Nguyên Giáp
Mar 29 Ethel and Julius Rosenberg are convicted of conspiracy to commit espionage
Mar 31 Remington Rand delivers the first UNIVAC I computer to the United States Census Bureau
Apr 5 Ethel and Julius Rosenberg are sentenced to death for spying for the Soviet Union
Apr 11 Korean War: President Harry Truman relieves General of the Army Douglas MacArthur of overall command in Korea
Apr 11 The Stone of Scone, the stone upon which Scottish monarchs were traditionally crowned, is found on the site of the altar of Arbroath Abbey. It had been taken by Scottish nationalist students from its place in Westminster Abbey
Apr 17 The Peak District becomes the United Kingdom's first National Park
Apr 19 General Douglas MacArthur retires from the military
Apr 20 Dan Gavriliu performs the first surgical replacement of a human organ
Apr 22 Korean War: The Chinese People's Volunteer Army begin assaulting positions defended by the Royal Australian Regiment and the Princess Patricia's Canadian Light Infantry at the Battle of Kapyong
Apr 23 American journalist William N. Oatis is arrested for espionage by the Communist government of Czechoslovakia
Apr 25 Korean War: Assaulting Chinese forces are forced to withdraw after heavy fighting with UN forces, primarily made up of Australian and Canadian troops, at the Battle of Kapyong
Apr 29 Tibetan delegates to the Central People's Government arrive in Beijing and draft a Seventeen Point Agreement for Chinese sovereignty and Tibetan autonomy
May 3 London's Royal Festival Hall opens with the Festival of Britain
May 3 The United States Senate Armed Services and Foreign Relations Committees begin their closed door hearings into the dismissal of General Douglas MacArthur by U.S. President Harry Truman
May 13 The 400th anniversary of the founding of the National University of San Marcos is commemorated by the opening of the first large-capacity stadium in Peru
May 14 Trains run on the Talyllyn Railway in Wales for the first time since preservation, making it the first railway in the world to be operated by volunteers
May 15 The Polish cultural attaché in Paris, Czesław Miłosz, asks the French government for political asylum
May 16 The first regularly scheduled transatlantic flights begin between Idlewild Airport (now John F Kennedy International Airport) in New York City and Heathrow Airport in London, operated by El Al Israel Airlines
May 21 The opening of the Ninth Street Show, otherwise known as the 9th Street Art Exhibition – a gathering of a number of notable artists, and the stepping-out of the post war New York avant-garde, collectively known as the New York School
May 23 Tibetans sign the Seventeen Point Agreement for the Peaceful Liberation of Tibet with China
May 28 The British radio comedy program The Goon Show was broadcast on the BBC for the first time
Jun 14 UNIVAC I is dedicated by the U.S. Census Bureau
Jul 4 William Shockley announced the invention of the junction transistor
Jul 4 A court in Czechoslovakia sentences American journalist William N. Oatis to ten years in prison on charges of espionage
Jul 10 Korean War: Armistice negotiations begin at Kaesong
Jul 16 King Leopold III of Belgium abdicates in favor of his son, Baudouin I of Belgium
Jul 16 The Catcher in the Rye by J. D. Salinger is published for the first time by Little, Brown and Company
Jul 20 King Abdullah I of Jordan is assassinated by a Palestinian while attending Friday prayers in Jerusalem
Jul 22 Dezik (Дезик) and Tsygan (Цыган, "Gypsy") are the first dogs to make a sub-orbital flight
Jul 26 Walt Disney's 13th animated film, Alice in Wonderland, premieres in London, England, United Kingdom
Sep 1 The United States, Australia and New Zealand sign a mutual defense pact, called the ANZUS Treaty
Sep 3 The first long-running American television soap opera, Search for Tomorrow, airs its first episode on the CBS network
Sep 4 The first live transcontinental television broadcast takes place in San Francisco, from the Japanese Peace Treaty Conference