April 14 - American Revolutionary War: Massachusetts Governor Gage is secretly ordered by the British to enforce the Coercive Acts and suppress open rebellion by an iron hand.
April 18 - American Revolutionary War: General Gage orders 700 troops to Concord to destroy the rebels' weapons depot.
April 18 - American Revolutionary War: Paul Revere makes his famous midnight ride - "Listen my children, and you shall hear of the midnight ride of Paul Revere on the eighteenth of April, in seventy-five; hardly a man is now alive who remembers that famous day and year" (Henry Wadsworth Longfellow).
April 19 - American Revolutionary War: The Battle of Lexington and Concord begins at dawn with a volley on 70 armed Massachusetts militiamen on Lexington Green by the British advance guard, which leaves 8 dead and 10 wounded - "the shot heard around the world".
May-June
May 10 - American Revolutionary War: The Continental Congress meets, elects John Hancock president, raises the Continental army under George Washington as commander and authorizes the colonies to adopt their own constitutions.
June 12 - American Revolutionary War: The British forces offered a pardon to all colonists who would lay down their arms. With two exceptions Samuel Adams and John Hancock, if captured, were to to be hanged
August 23 - American Revolutionary War: Refusing to even look at the Olive Branch Petition, King George issues a Declaration of Rebellion against the American colonies.
July 6 - American Revolutionary War: The Continental Congress issues Declaration of the Causes and Necessity of Taking Up Arms, which contains the words: "Our cause is just. Our union is perfect... being with one mind resolved to die freemen rather than to live slaves...".
November 10 - The United States Marine Corps was born in Tun Tavern, Philidelphia. American Revolutionary War: The Continental Congress passes a resolution creating the Continental Marines (later renamed the United States Marine Corps) to serve as landing troops for the recently created Continental Navy (the Marines were disbanded at end of war in April of 1783 but were reformed on July 11, 1798).
November 10 - Hampden-Sydney College in Virginia founded. Continues today as one of three all men's colleges left in the United States.