[SampleMan]

The USMC is part of the Navy, therefore it is technically one service with two elements. Many operations have been done together, that indeed is the whole point. One such example is the battle for Guadalcanal, where Bull Halsey was in charge of the entire shebang.

There is nothing wrong with Joint, but separate missions are best left to separate services. They are then brought together to fight the battle.

[A.A. Cunningham]

The USMC is part of the Navy,

Bulls***. The Commandant doesn't answer to the CNO.