1951January 4 – Korean War: Third Battle of Seoul – Chinese and North Korean forces capture Seoul for the second time (having lost the Second Battle of Seoul in September 1950). January 9 – The Government of the United Kingdom announces abandonment of the Tanganyika groundnut scheme for the cultivation of peanuts in the Tanganyika Territory, with the writing off of £36.5M debt. January 15 – In a court in West Germany, Ilse Koch, The "Witch of Buchenwald", wife of the commandant of the Buchenwald concentration camp, is sentenced to life imprisonment.
1943Below, the events of World War II have the "WWII" prefix. January 1943 January 1 – WWII: The Soviet Union announces that 22 German divisions have been encircled at Stalingrad, with 175,000 killed and 137,650 captured. January 4 – WWII: Greek-Polish athlete and saboteur Jerzy Iwanow-Szajnowicz is executed by the Germans at Kaisariani. January 10 – WWII: Guadalcanal Campaign: American forces of the 2nd Marine Division and the 25th Infantry Division begin their assaults on the Galloping Horse and Sea Horse on Guadalcanal.
1963January 1963 January 1 – Bogle–Chandler case: Commonwealth Scientific and Industrial Research Organisation scientist Dr. Gilbert Bogle and Mrs. Margaret Chandler are found dead (presumed poisoned), in bushland near the Lane Cove River, Sydney, Australia. January 2 – Vietnam War – Battle of Ap Bac: The Viet Cong win their first major victory. January 9 – A total penumbral lunar eclipse is visible in the Americas, Europe, Africa, and Asia, and is the 56th lunar eclipse of Lunar Saros 114. Gamma has a value of −1.
1979January 1979 January 1 United Nations Secretary-General Kurt Waldheim heralds the start of the International Year of the Child. Many musicians donate to the Music for UNICEF Concert fund, among them ABBA, who write the song Chiquitita to commemorate the event. The United States and the People's Republic of China establish full diplomatic relations. Following a deal agreed during 1978, French carmaker Peugeot completes a takeover of American manufacturer Chrysler's European operations, which are based in Britain's former Rootes Group factories, as well as the former Simca factories in France.
1978January 1 – Air India Flight 855, a Boeing 747 passenger jet, crashes off the coast of Bombay, killing 213. January 5 – Bülent Ecevit, of CHP, forms the new government of Turkey (42nd government). January 6 – The Holy Crown of Hungary (also known as Stephen of Hungary Crown) is returned to Hungary from the United States, where it was held since World War II. January 10 – Pedro Joaquín Chamorro Cardenal, a critic of the Nicaraguan government, is assassinated; riots erupt against Somoza's government.
1939This year also marks the start of the Second World War, the largest and deadliest conflict in human history. Below, the events of World War II have the "WWII" prefix. January 1939 January 1 Coming into effect in Nazi Germany of: The Protection of Young Persons Act, passed on April 30, 1938, the Working Hours Regulations. The small businesses obligation to maintain adequate accounting. The Jews name change decree. With his traditional call to the New Year in Nazi Germany, Führer and Reich Chancellor Adolf Hitler addresses the members of the National Socialist German Workers' Party (NSDAP).
1903January 1903 January 1 – Edward VII is proclaimed Emperor of India. January 4 – Topsy, a female Asian circus elephant, is killed by electrocution at Luna Park, Coney Island, New York City. January 19 – The first west–east transatlantic radio broadcast is made from the United States to England (the first east–west broadcast having been made in 1901). January 17 – 13 days after Topsy's death, the Edison Manufacturing Company released the short, black-and-white, silent documentary film Electrocuting an Elephant, showing the footage of Topsy's electrocution.
1941The Correlates of War project estimates this to be the deadliest year in human history in these terms of conflict deaths, placing the death toll at 3.49 million. However, the Uppsala Conflict Data Program estimates that the subsequent year, 1942, was the deadliest such year. Death toll estimates for both 1941 and 1942 range from 2.28 to 7.71 million each. Below, the events of World War II have the "WWII" prefix.
1905As the second year of the massive Russo-Japanese War begins, more than 100,000 die in the largest world battles of that era, and the war chaos leads to the 1905 Russian Revolution against Nicholas II of Russia (Shostakovich's 11th Symphony is subtitled The Year 1905 to commemorate this) and the start of Revolution in the Kingdom of Poland. Canada and the U.S. expand west, with the Alberta and Saskatchewan provinces and the founding of Las Vegas.
1904January 1904 January 7 – The distress signal CQD is established, only to be replaced 2 years later by SOS. January 8 – The Blackstone Library is dedicated, marking the beginning of the Chicago Public Library system. January 12 – The Herero Wars in German South West Africa begin. January 17 – Anton Chekhov's last play, The Cherry Orchard («Вишнëвый сад», Vishnevyi sad), opens at the Moscow Art Theatre directed by Constantin Stanislavski, 6 month's before the author's death.