Any member voting to enter war sends one of their children infantry, first wave. No war unless congress declares war.

http://tenthamendmentcenter.com/2008/07/12/only-congress-can-declare-war/

Let's have those who send us into wars-for-profit put some skin into the game. If the war is just, they will not mind sending their children to become heros.

Too many "policing actions" and other undeclared wars. If above a certain number of military, congress must vote to continue.