The Second Continental Congress adopts the Olive Branch Petition.

The Second Continental Congress (1775–1781) was the meetings of delegates from the Thirteen Colonies that united in support of the American Revolution and Revolutionary War, which established American independence from the British Empire. The Congress constituted a new federation that it first named the United Colonies of North America, and in 1776, renamed the United States of America. The Congress began convening in present-day Independence Hall in Philadelphia, on May 10, 1775, with representatives from 12 of the 13 colonies, following the Battles of Lexington and Concord, the first battles of the Revolutionary War, which were fought on April 19, 1775.

The Olive Branch Petition was adopted by the Second Continental Congress on July 5, 1775, and signed on July 8, 1775, in a final attempt to avoid war between Great Britain and the Thirteen Colonies in America. The Congress had already authorized the invasion of Canada more than a week earlier, but the petition affirmed American loyalty to Great Britain and entreated King George III to prevent further conflict. It was followed by the July 6, 1775 Declaration of the Causes and Necessity of Taking Up Arms, however, which made its success unlikely in London. In August 1775, the colonies were formally declared to be in rebellion by the Proclamation of Rebellion, and the petition was rejected by the British government; King George had refused to read it before declaring the colonists traitors.