What do the insignia on each stamp represent?
The insignias..
Chesty Lewis Puller
1st Marine Division
Guadalcanal
John A. Lejeune
US Army's 2nd Infantry Division
John Basilone
5th Marine Division
Daniel J. Daly
Medal of Honor, 2 times
From upper left, going clockwise: 2nd Infantry Division (where the Marines in the AEF served on the Western Front in the First World War and which General Lejune commanded); the First Marine Division; 73rd Machinegun Company; and the 5th Marine Regiment.