In February 1776, Crockett enlisted with Captain Thomas Posey's company of the 7th Virginia Regiment. He served with the 7th from 1776 to 1778, and fought at the Battles of Saratoga and Brandywine. At Saratoga, he gave aid to a wounded General Lafayette. From 1778 to the end of the war, he was a First Lieutenant in the Illinois Regiment of Virginia under George Rogers Clark. He also served with his cousin, Colonel Joseph Crockett. He fought with the regiment in the Battles of Blue Licks, Piqua and Chillicothe. From 1782 to 1794, he was a soldier in the Northwest Indian War.