Which congress adopted the Declaration of Independence in 1776, creating the historical basis for America250?

The Second Continental Congress adopted the Declaration of Independence in 1776.

This revolutionary governing body met in Philadelphia beginning in May 1775, after fighting had started between colonial forces and Britain. It coordinated the war effort, authorized the Continental Army, and eventually acted on the question of independence.

On July 4, 1776, the Second Continental Congress approved the Declaration. Its delegates represented the Thirteen Colonies, although the practical process of signing the final parchment copy extended beyond the adoption date.

The First Continental Congress had met in 1774 to coordinate colonial resistance but did not declare independence. The Second Continental Congress continued operating under changing names and arrangements until the Articles of Confederation took effect in 1781.