What has more action the marines or the Army?

Depends on what the future holds, and also what you do. Both services deploy frequently... rotations might be more commonplace in the Marines, as it has a much smaller force to draw from. Both forces have units which deploy regularly, and they both have units which don't deploy at all. If your purpose of enlisting is simply looking for "action", you may want to reconsider it.... after three tours as a Combat Medic in the Army, I can tell you firsthand your eagerness for "action" will wane very quickly.