What's the least amount of time required to serve in the military?

I'm considering joining the military after high school and trying to understand the minimum commitment required. Is there a branch with a shorter service duration than others? Any insights into the shortest enlistment terms would be appreciated!

Each branch of the U.S. military has different minimum lengths for active duty enlistment.

- The Army offers enlistment contracts of two, three, four, five, and six years. The Short-term Enlistment Program allows someone to commit to only two years of active duty.

- The Navy's enlistment contracts typically run for four to six years of active duty.

- The Marine Corps' minimum initial service commitment is four years of active duty.

- The Air Force typically has four to six years of active duty.

- The Coast Guard requires a minimum of four years of active duty.

- The newly established Space Force, as the Air Force's sibling, likely has similar terms, although as a newer branch, specific terms may vary.

While these are the standard active duty terms, keep in mind that there will also be a period of service in the Inactive Ready Reserve (IRR). After active duty ends, members transition into the IRR for the remainder of their 8-year military service obligation. So, even if a 2 or 3-year contract is signed, the service member will be in the IRR for the remaining 6 or 5 years.

Also, bear in mind that shorter contracts may limit the jobs/Military Occupational Specialties (MOS) available to you, as some fields require longer commitments due to the extensive training involved. Speaking with a recruiter from the branches you're interested in can give you a more accurate picture of what your options might be. They can provide additional guidance on the service length requirements for different roles and programs.