In order to join the United States military, an applicant must have a high school diploma, hold United States citizenship, be at least 17 years old and pass a physical medical exam. Each branch of the military has different entrance requirements.
To join the Air Force, applicants must be between the ages of 17 and 27. They must have no more than two children and pass the Armed Services Vocational Aptitude Test.
The Army requires its applicants to be between the ages of 17 and 34, have no more than two children and pass the Armed Service Vocational Aptitude Test.
Joining the Coast Guard requires an applicant to be between the ages of 17 and 39, have no more than two dependents, have the ability to serve on or around water and pass the Armed Services Vocational Aptitude Battery Test.
The Marines require more to enter their ranks. Applicants must meet strict physical, mental and moral standards and be between the ages of 17 and 29. They must be able to pass the Armed Services Vocational Battery test, and as of 2015, women are not allowed to enter combat arms specialties or infantry tank and amphibian tractor crews.
To qualify for naval service, applicants must be between 17 and 34 and pass the Armed Services Vocational Aptitude Battery test. Although women may join the Navy, they may not become Navy Seals or work on submarines.
17-year-old applicants must have parental consent before enlisting in any branch of the military.