The French and Indian War was the front in North America of the Seven Years' War between Britain and France. In June 1754 Chartier, his Shawnee warriors, and his two sons, François and René were present when Captain Joseph Coulon de Jumonville was killed at the Battle of Jumonville Glen. In July 1754 he and his sons participated in the French victory over George Washington at the Battle of Fort Necessity. Both of Chartier's sons fought against the British in numerous engagements during the French and Indian War. René may have been killed with Shawnee chief Cornstalk when he was detained at Fort Randolph in November 1777.