Army does 12-15 month combat tours.
Marines do 5-9 month combat tours
Army has bigger balls. More money. Better gear. Better training. Better leadership. Better food. Better PX and better schools and is the father of all Special Operations going to Rangers and the OSS.
JFK didn't give Marines their own colored hat to wear did he? Nope that was Army Special Forces.
Marines still go to Army airborne school. KEK
Shit Marines had to invent MARSOC just so they could get a seat at the adult table in USSOCOM.