Births on April 21

Alexander Anderson, Scottish-American illustrator and engraver (d. 1870)

Dr Alexander Anderson (April 21, 1775 – January 17, 1870) was an American physician and illustrator.

8 Mar

Abolitionism in the United States
An anonymous writer, thought by some to be Thomas Paine, publishes "African Slavery in America", the first article in the American colonies calling for the emancipation of slaves and the abolition of slavery.
18 Apr

Battles of Lexington and Concord
American Revolution: The British advancement by sea begins; Paul Revere and other riders warn the countryside of the troop movements.
19 Apr

Battles of Lexington and Concord
American Revolutionary War: The war begins with an American victory in Concord during the battles of Lexington and Concord.
17 Jun

Battle of Bunker Hill
American Revolutionary War: Colonists inflict heavy casualties on British forces while losing the Battle of Bunker Hill.
3 Jul

George Washington
American Revolutionary War: George Washington takes command of the Continental Army at Cambridge, Massachusetts.