Why do they need to call back a mother with kids four years after her discharge?
Young American men will not enlist in large enough numbers.
Even though the military is pretty small now they still need people and if the girlfriends and the moms have to fill in for the young men of this generation then it will have to do.
Because she raised her right hand a swore an oath. Every enlisted member incurs an eight year commitment, regardless of the term of active duty enlistment. In peace time your name goes on a list and you never hear from the military. In war time you might get called.