The United States Army was founded.
The Continental Congress adopted the Stars and Stripes as the official flag of the U.S.
Warren Harding became the first president to be heard on the radio.
German troops entered Paris. The Nazis opened the Auschwitz concentration camp in Poland.
The first commercial computer, Univac I, was unveiled.
President Eisenhower signed the order inserting the words "under God" into the Pledge of Allegiance.
Argentine forces surrendered to British troops on the Falkland Islands.