Joining the military is a big commitment - by both you and the military. This commitment is not to be taken lightly. Most first-term enlistments require a commitment to four years active and two years inactive (IRR). But the services also offer programs with two-, three- and six-year active duty or reserve enlistments. It depends upon the service and the job that you want.
For information on joining the US Military, please see our Recruiting section.