Um... sorry, but that's inaccurate in multiple ways. First, this isn't 1920, so yes, females are permitted to engage in combat. Second, once you sign the contract to join the military, you're bound to those military duties. It's all in the agreement, and breaking that contract makes you subject to court-martial. "Drafting" is the process by which U.S. citizens are selected from the general populace to join the armed forces in wartime, but that hasn't been done for decades (for obvious reasons).

Moral of the story: If you don't want to fight, don't join the army, kids!