The Continental Congress was a series of legislative bodies, with some executive function, who acted as the Provisional Government for the Thirteen Colonies of Great Britain in North America, and the newly declared United States before, during, and after the American Revolutionary War. The Continental Congress refers to both the First and Second Congresses of 1774–1781 and at the time, also described the Congress of the Confederation of 1781–1789. The Confederation Congress operated as the first federal government until being replaced following ratification of the U.S. Constitution. Until 1785, the Congress met predominantly at what is today Independence Hall in Philadelphia, though it was relocated temporarily on several occasions during the Revolutionary War and the fall of Philadelphia.
The First Continental Congress convened in Philadelphia in 1774 in response to escalating tensions between the colonies and the British, which culminated in passage of the Intolerable Acts by the British Parliament following the Boston Tea Party. The First Congress met for about six weeks, mainly to try to repair the fraying relationship between Britain and the colonies while asserting the rights of colonists, proclaiming and passing the Continental Association, which was a unified trade embargo against Britain, and successfully building consensus for establishment of a second congress. The Second Continental Congress convened in 1775, soon after hostilities broke out in Massachusetts. Soon after meeting, the Second Congress sent the Olive Branch Petition to King George III, established the Continental Army, and elected George Washington commander of the new army. After the king issued the Proclamation of Rebellion in August 1775 in response to the Battle of Bunker Hill, some members of the Second Congress concluded that peace with Britain would not be forthcoming, and began working towards unifying the colonies into a new nation. The body adopted the Lee Resolution for Independence on July 2, 1776, and the Declaration of Independence two days later, on July 4, 1776, proclaiming that the former colonies were now independent sovereign states.