He served as an artillery and political officer in Algeria, Tunisia and Morocco before retiring to a civil post in 1918 so that he could begin a literary career.

He wrote numerous journal articles and several books including a description of the French defeat at the Battle of El Herri.

He studied as an officer-cadet at the School of Artillery and Engineering in Fontainebleau and, after being commissioned as an officer, served with the army in Algeria and Tunisia.

[1][3] In Les Sentiers de la Guerre et le Famour he tells the story of the French defeat at the Battle of El Herri in the Zaian War and praises the leadership skills of Mouha ou Hammou Zayani.

Le Glay inspired and was patron of a number of other authors on Moroccan life including Moses Nahon, Thomas Lonie, Said Guennoun, René Eulogius and Henri Duquaire.