How to Join the Military: Step-by-Step (2026)
Updated July 2026
Joining the U.S. military follows the same basic path in every branch: confirm you qualify, decide how and where you want to serve, take the ASVAB, pass MEPS, and ship to basic training. Here is exactly how it works, start to finish.
Step 1: Make sure you qualify
Before anything else, check the basics. General requirements are:
- Age: 17 (with parental consent) up to your late 30s — the maximum varies by branch and changes periodically.
- Citizenship: U.S. citizen or lawful permanent resident (green card).
- Education: a high-school diploma is strongly preferred; a GED may work but often with limits.
- Medical: you must pass a physical and meet height/weight standards.
- Legal: serious criminal history or certain drug involvement can disqualify you or require a waiver.
These are guidelines — a recruiter has the exact, current standards for your situation.
Step 2: Decide how you want to serve — Active, Guard, or Reserve
This is a separate decision from choosing a branch:
- Active Duty — full-time; the military is your job and you can be stationed anywhere. Available in all six branches.
- National Guard — part-time (typically one weekend a month, two weeks a year) while you keep a civilian job; can be activated by your governor or the President. Army and Air Force only.
- Reserve — part-time and federal-only; backs up the active force. Every branch has one.
See our full Active vs. Guard vs. Reserve breakdown.
Step 3: Choose your branch
The six branches differ in mission, lifestyle, jobs, and culture — Army, Navy, Air Force, Marine Corps, Space Force, and Coast Guard. Compare them side by side on our branch comparison, and think about the jobs each one offers, not just the name.
Step 4: Talk to a recruiter
Contact an official recruiter for the branch you want. Recruiters confirm your eligibility, answer questions, and guide every step — and they are free. Never pay anyone to help you enlist. It is fine to talk to recruiters from more than one branch before deciding.
Step 5: Take the ASVAB
The Armed Services Vocational Aptitude Battery (ASVAB) measures your aptitudes. Your AFQT score (drawn from four of the subtests) determines whether you can enlist, and your subtest scores determine which jobs you qualify for. Study first — a higher score opens more and better jobs. Use our free ASVAB practice tests.
Step 6: Go to MEPS
At a Military Entrance Processing Station (MEPS) you complete a medical exam, background screening, and job selection, then take the Oath of Enlistment. It is often a long day. Be completely honest about your medical and legal history — hiding something can end your career later.
Step 7: Delayed Entry Program, then basic training
Most recruits enlist into the Delayed Entry Program (DEP) and ship to basic training on a future date, up to a year out. Basic training runs about 7–13 weeks depending on branch. Start getting physically fit now — it makes basic far easier.
Frequently asked questions
What are the age limits to join the military?
Generally you can join from age 17 (with parental consent) up to your late 30s. The maximum age varies by branch and changes periodically — for example the Army raised its limit to 42 in 2026. A recruiter has the current cutoff for your branch.
Can you join the military with a GED instead of a diploma?
Often yes, but with limits. GED holders usually face tighter quotas and higher ASVAB score requirements than high-school diploma graduates. Earning some college credits can help.
Can you choose your job in the military?
You can request a job, but it depends on your ASVAB scores, current openings, medical qualification, and security clearance eligibility. Higher ASVAB scores qualify you for more jobs. Get your job in writing before you sign.
How long do you have to commit when you enlist?
A typical first active-duty enlistment is about four years, though some jobs run two to six. Guard and Reserve contracts are usually six years of part-time service. There is also a remaining service obligation after active duty.
Can you quit the military after joining?
While in the Delayed Entry Program (before you ship to basic), you are still a civilian and can generally decline to ship. Once you take the oath and enter active duty, you are contractually obligated to serve your term.