What are the military guidlelines for flying troops to/from combat zones?

Do troops fly via military airplane to/from combat zones? When they are required to fly commercial, does the military tell them that they can only have x number of bags, and anything over that is at their own cost? The military pays for commercial flights to/from combat zones, right? And so the military must also have guidelines on how much luggage is covered when flying commercial?|||Luggage allowance is specified in their orders.|||My husband just deployed and flew American Airlines into a country close to the combat zone, then took a military helicopter to his final destination. The flight was paid for by the military and his orders specified the number of bags he could check|||No commercial flights do not transport military troops to and from combat zones. It is done via military aircraft or a contracted airline. But when returned and flying in the US then they can be flying via commercial airline.