Simon served as head of intelligence to Hubert Lyautey and as director of the Moroccan Indigenous Affairs Service as well as conventional combat roles.

[5] An initially temporary arrangement Simon provided such "good service" that his superior, Colonel Pein, called them "the marvel and revelation of this campaign" and they were expanded and integrated as a permanent part of the French armed forces.

After the Battle of Sidi Bou Othman Simon lead a column of French troops to Marrakesh to rescue European hostages held there and swiftly brought the rebellion to an end.

[6] In 1913 he was placed in charge of the Moroccan Native Affairs service and, fighting successfully alongside Mangin in Western Morocco, he was given command of the Oued Zem sector.

[11] Simon was a Général de Brigade and commanded the French "bridgehead" at Düsseldorf, Germany on 12 July 1923 when he was appointed grand officer of the Legion of Honour.