The Marines are a separate branch that serves with the Navy and focus on amphibious operations, while the Army is the main land-based force.
Marines
A separate branch within the Department of the Navy. They are known for amphibious and rapid response operations. About 172,000 active members.
Army
The largest branch, focused on land warfare. About 450,000 active members.
Differences
- Boot camp: Marines 13 weeks, Army 10 weeks.
- Marines rely on Navy for medical and chaplain services.
- Mission: Army, sustained land combat. Marines, expeditionary force in readiness.
Pay
Same pay scale for both.
Branch of service
The Marine Corps is part of the Department of the Navy, and the Army is a separate branch under the Department of the Army. Marines are a rapid response, expeditionary force that fights on land, sea and air. The Army is the largest ground force.
Size
The active duty Army has about 450,000 soldiers, and the Marine Corps about 170,000, according to Department of Defense data.
Basic training
Marine boot camp lasts 13 weeks at Parris Island, South Carolina, or San Diego, California, and ends with the Crucible, a 54 hour test. Army Basic Combat Training is 10 weeks, held at several bases, including Fort Jackson and Fort Benning.
Enlistment
Both require at least a high school diploma or GED in most cases and a passing score on the ASVAB. Age limits are generally 17 to 35 for the Army and 17 to 28 for the Marine Corps.
Roles
Army jobs, called Military Occupational Specialties (MOS), cover over 150 options, including infantry, medical, aviation, engineering, cyber and logistics. The Marines have about 30 occupational fields and rely on the Navy for medical and chaplain support.
Culture
The Marines are known for emphasis on a rifleman ethos, small unit leadership and tradition. Army culture covers broad missions and large unit operations.
Pay
Basic pay is the same across branches by rank and time in service. A new private (E-1) earned about 1,917 dollars per month in 2024. Allowances for housing and food are added where qualified.
Benefits
Both offer the GI Bill, healthcare through TRICARE, retirement after 20 years and tuition assistance.
Choosing
Talk with recruiters from each branch, compare jobs, locations and contract length. Ask for the job guarantee in writing.
Branch and size
The Marine Corps is a separate branch under the Department of the Navy and is the smallest of the main combat branches, with around 172,000 active duty members, while the Army is the largest with roughly 450,000 active duty soldiers. Marines are expeditionary and amphibious, trained to deploy quickly by sea and air, and Army forces provide sustained land operations with a wider range of jobs. Both train all members as basic riflemen.
Training and service terms
Marine Corps recruit training is about 13 weeks, including the 54 hour Crucible exercise, at Parris Island, South Carolina, or San Diego, California. Army Basic Combat Training is about 10 weeks, followed by advanced individual training for a specific job. Enlistment contracts are typically 4 years of active duty in the Marines and 2 to 6 years in the Army, depending on the job and bonuses. Pay is the same for the same rank under federal pay tables, and both offer education benefits like the GI Bill. The Army has more job specialties than the Marines, which has about 180 occupational specialties.
Based on data from the US Department of Defense and the Marine Corps
