Combine the Armed Forces?

Here is an interesting concept to potentially save money and lives and boost federal government morale.  We currently have 5 seperate branches of the military; Army, Navy, Air Force, Coast Guard, and the Marines.  They all have different weapons, transportation, etc but imagine the  money that the government would save and the efficientcy if they combined these forces to have the same forms of communication, ground, water, and air support, and weaponry.  The Department of Defense would be wise to consider options to boost the efficientcy of the department.  Just some food for thought.