American Revolutionary War: In Paris the Treaty of Alliance and the Treaty of Amity and Commerce are signed by the United States and France signaling official recognition of the new republic.
Massachusetts becomes the sixth state to ratify the United States Constitution.
The first 86 African American immigrants sponsored by the American Colonization Society depart New York to start a settlement in present-day Liberia.
American Civil War: Forces under the command of Ulysses S. Grant and Andrew H. Foote give the Union its first victory of the war, capturing Fort Henry, Tennessee in the Battle of Fort Henry.
Spanish-American War: The Treaty of Paris, a peace treaty between the United States and Spain, is ratified by the United States Senate.
British women over the age of 30 get the right to vote.
World War II: The United Kingdom declares war on Thailand.
Elizabeth II becomes queen regnant of the United Kingdom and the other Commonwealth realms upon the death of her father, George VI. At the exact moment of succession, she was in a tree house at the Treetops Hotel in Kenya.
Eight Manchester United F.C. players and 15 other passengers are killed in the Munich air disaster.