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How many branches are in the military of the United States? There are five branches of the US Military.   -Army   -Dept of Navy (including Marine Corps)   -Air force       The are 5 distinct branches of the Unâ¦ited States Military.
Types of Service. 1  The Military is comprised of 12 branches: five Active Duty and seven part-time duty. 2  Active-duty service members are full-time members of the Military. 3  They are employed either domestically or overseas.o problem. In this section, you'll find a brief overview of each Service branch, the differences between full-time and part-time duty and links to complete information on each Service. 1  Overview. 2  Army. 3  Marine Corps. 4  Air Force. 5  Coast Guard.