Thayendanegea or Joseph Brant (March 1743 – 24 November 1807) is a Mohawk military and political leader, based in present-day New York, who is closely associated with Great Britain during and after the American Revolution.

He is perhaps the best-known American Indian of his generation.

He meets many of the most significant people of the age, including George Washington and King George III.

While not born into a hereditary leadership role within the Iroquois League, Brant rises to prominence due to his abilities and his connections to British officials.

Through his sister, Molly Brant, he is associated with Sir William Johnson, the influential British Superintendent of Indian Affairs in the province of New York.

During the American Revolutionary War, Brant leads Mohawk and colonial Loyalists against the rebels in a bitter partisan war on the New York frontier.

He is accused by the Americans of committing atrocities, charges that are later shown to be false.

After the war, he relocates with most of his people to Canada to the Six Nations Reserve, where he remains a prominent leader.