The First Continental Congress was a meeting of delegates from 12 of the 13 British colonies that became the United States. It met from September 5 to October 26, 1774, at Carpenters' Hall in Philadelphia, Pennsylvania, after the British Navy instituted a blockade of Boston Harbor and Parliament passed the punitive Intolerable Acts in response to the December 1773 Boston Tea Party. During the opening weeks of the Congress, the delegates conducted a spirited discussion about how the colonies could collectively respond to the British government's coercive actions, and they worked to make a common cause.

As a prelude to its decisions, the Congress's first action was the adoption of the Suffolk Resolves, a measure drawn up by several counties in Massachusetts that included a declaration of grievances, called for a trade boycott of British goods, and urged each colony to set up and train its own militia. A less radical plan was then proposed to create a Union of Great Britain and the Colonies, but the delegates tabled the measure and later struck it from the record of their proceedings. They then agreed on a Declaration and Resolves that included the Continental Association, a proposal for an embargo on British trade. They also drew up a Petition to the King pleading for redress of their grievances and repeal of the Intolerable Acts. That appeal had no effect, so the colonies convened the Second Continental Congress the following May, shortly after the battles of Lexington and Concord, to organize the defense of the colonies at the outset of the Revolutionary War.