2nd » World War I: President of the United States called U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the United States and Imperial Germany.
11th » A truce in the Irish War of Independence comes into effect.
11th » Former President of the United States William Howard Taft is sworn in as 10th Chief Justice of the United States or Chief Justice of the Supreme Court of the United States known as U.S. Supreme Court, becoming the only person ever to hold both offices.
27th » Researchers at the University of Toronto led by biochemist Frederick Banting prove that the hormone insulin regulates blood sugar.
29th » Adolf Hitler becomes leader of the Nazi Party or National Socialist German Workers Party.
Famous Birthdays on July in 1921
1st » Seretse Khama, Batswana politician, 1st President of Botswana (d. 1980)