Diplomacy in the Revolutionary War had an important impact on the Revolution, as the United States evolved an independent foreign policy.
Before the Revolutionary war, extra-colonial relations were handled in London. The colonies had agents in the United Kingdom, and established inter-colonial conferences. The colonies were subject to European peace settlements, settlements with Indian tribes, and inter-colony (between colonies) agreements.
Starting in 1772, several colonies formed Committees of Correspondence. Parliament enacted the Tea Act, in 1773, and after the Boston Tea Party, the Boston Port Act, Massachusetts Government Act, (or Intolerable Acts), in 1774. On November 27, 1775, the Continental Congress established a Committee of Correspondence, which in 1781, became the Department of Foreign Affairs.