25 June History
- 841 - Charles the Bald and Louis the German defeat Lothar at Fontenay.
- 1658 - Aurangzeb proclaims himself emperor of the Moghuls in India.
- 1767 - Mexican Indians riot as Jesuit priests are ordered home.
- 1857 - Gustave Flaubert goes on trial for public immorality regarding his novel, Madame Bovary.
- 1862 - The first day of the Seven Days' campaign begins with fighting at Oak Grove, Virginia.
- 1864 - Union troops surrounding Petersburg, Virginia, begin building a mine tunnel underneath the Confederate lines.
- 1868 - The U.S. Congress enacts legislation granting an eight-hour day to workers employed by the federal government.
- 1876 - General George A. Custer and over 260 men of the Seventh Cavalry are wiped out by Sioux and Cheyenne Indians at Little Big Horn in Montana.
- 1903 - Marie Curie announces her discovery of radium.
- 1920 - The Greeks take 8,000 Turkish prisoners in Smyrna.
- 1921 - Samuel Gompers is elected head of the American Federation of Labor for the 40th time.
- 1941 - Finland declares war on the Soviet Union.
- 1946 - Ho Chi Minh travels to France for talks on Vietnamese independence.
- 1948 - The Soviet Union tightens its blockade of Berlin by intercepting river barges heading for the city.
- 1950 - North Korea invades South Korea, beginning the Korean War.
- 1959 - The Cuban government seizes 2.35 million acres under a new agrarian reform law.
- 1962 - The U.S. Supreme Court bans official prayers in public schools.
- 1964 - President Lyndon Johnson orders 200 naval personnel to Mississippi to assist in finding three missing civil rights workers.
- 1973 - White House Counsel John Dean admits President Nixon took part in the Watergate cover-up.
- 1986 - Congress approves $100 million in aid to the Contras fighting in Nicaragua.
25 June Birthdays
- 1881 - Crystal Eastman, suffragist.
- 1886 - Henry (Hap) Arnold, U.S. Army Air Force general during World War II.
- 1887 - George Abbott, American playwright, director and producer (Three Men on a Horse, Damn Yankees).
- 1903 - George Orwell (Eric Arthur Blair), novelist, essayist and critic (Animal Farm, 1984).