Battle of Malplaquet
At age 22, he enlisted in the French Army, and fought in Flanders during the War of the Spanish Succession; he was seriously wounded at the Battle of Malplaquet. After recovering from his injuries and being given paroled as a prisoner of war, Gaultier returned to Canada and married Marie-Anne, daughter of Louis Dandonneau, Sieur Du Sablé, in 1712. For the next 15 years, he supported his family by farming and fur trading along the Saint Lawrence.