U.S. Marine Corps Aviation Unit Insignia

U.S. Marine Corps aviation unit insignia from 1941-1946. 

(From Prologue) During WWI Marine Corps Aviation personnel used a shoulder sleeve insignia. Marine Corps aviation unit insignia first came into use during the mid 1920's with the Ace Of Spades insignia of the 1st Air Squadron and the Running Red Devil insignia of VF-3M.