During the American Revolution, many Tuscarora and the Oneida took the side of the colonists, while the Mohawk, Seneca, Onondaga and Cayuga remained loyal to Great Britain. This was the first major split among the Six Nations. Joseph Louis Cook offered his services to the United States and received a Congressional commission as a Lieutenant Colonel- the highest rank held by any Native American during the war. However, after a series of successful operations against frontier settlements – led by the Mohawk war chief Joseph Brant, other war chiefs, and British allies – the future United States wanted revenge. In 1779, George Washington ordered the Sullivan Campaign led by Col. Daniel Brodhead and General John Sullivan against the Iroquois nations to "not merely overrun, but destroy," the British-Indian alliance.