March 31st. 1774 Boston port Closed.

• 1774 – American Revolutionary War: The Kingdom of Great Britain orders the port of Boston,Massachusetts closed pursuant to the Boston Port Act.
• The American Revolutionary War (1775–1783), the American War of Independence, or simply the Revolutionary War in the United States, was the successful rebellion against Great Britain of thirteen North American colonies who confederated themselves as the United States of America. Originally limited to fighting in those colonies, after 1778 it also became a world war between Britain and France, Netherlands, Spain, and Mysore. American independence was achieved and European powers recognized the independence of the new United States, with mixed results for the other nations involved.
  The war had its origins in the resistance of many Americans to what they deemed as unlawful taxes imposed by the British parliament. Formal acts of rebellion against British authority began in late 1774 when the Patriot Suffolk Resolves effectively abolished the legal government of the Province of Massachusetts Bay. The tensions caused by this directly led to the outbreak of fighting between Patriot militia and British regulars at Lexington and Concord in April 1775. By the end of 1775 rebels had seized full control in thirteen British colonies and on July 4, 1776, their Continental Congress declared them to be free and independent states. The British were meanwhile mustering large forces to put down the revolt. They inflicted significant defeats on the American rebel army, now under the command of George Washington, capturing New York City in 1776 and later Philadelphia in 1777. But they were unable or unwilling to land a finishing blow against him. British strategy relied on mobilizing American Loyalist militia, of whom they made little effort to enlist until late in the war. Poor coordination helped doom a British advance against Albany in 1777, which resulted in the capture of a British army following the Battles of Saratoga.