I picked up this illustrated children's book from a charity shop for 49p. The illustrations are similar to the Angus McBride Look and Learn illustrations.
Here are just a few from Mont Saint-Michel for Young People.
The illustrations are by Pierre Joubert and the book is published in France by Editions Ouest-France as part of the History in Pictures collection edited by Lucien Bely. This English translation was done by Paul Williams.
I have searched the Internet for further illustrations by Pierre Joubert and can confirm that there are quite a few that would be of interest to the military painter/gamer.