sentences:  As colonel, he commanded the 33rd Infantry Regiment at Arras from 1911; the young lieutenant Charles de Gaulle, who served under him, later wrote that his "first colonel, Pétain, taught (him) the Art of Command".In the spring of 1914, he was given command of a brigade (still with the rank of colonel).However, aged 58 and having been told he would never become a general, Pétain had bought a villa for retirement.