The organization of the Marine infantry regiment

"The purpose of military organization is to secure the most effective use of the men, weapons, and other resources of a body of troops .. The tables contained in Part II of this book are the Marine Corps Tables of Organization approved by the Commandant 27 March, 1944 (with changes of 22 July, 1944) ... Part I contains diagrams of the various units and an explanation of their composition and armament so that the new student will be better able to understand and use the tables." -- page vii.