In 1925 De Gaulle was promoted to the staff of the Supreme War Council by this marshal
Promoted to brigadier general under Foch, Weygand was sent to Switzerland to 
advise ... Like de Gaulle, Weygand was an advocate of developing armored 
warfare ... Weygand became the army's chief of staff on January 3, 1930, with his 
rival ... assuming the office of president of the Supreme War Council.