Good question. Congress has formally declared war only five times (including some sub-declarations in the WWs). Since shortly after the founding, there's been some tension between the Constitution's division of power between "Congress shall have the power to to declare War", and the equally authoritative "The President shall be Commander in Chief...". For now, military action by the President with authorization by Congress seems to be the agreed on resolution to the tension.I'm confused, I always thought that you need a declaration of war to go to war with someone. How is congress voting consent on war without a declaration?