You could have before marrying. Once you're established as a permanent resident for one year, you're eligible to enlist as a foreign national. You may not, however, serve as a commissioned officer without being a citizen.
Chavagnes International College was created in 1802.
Baltimore International College was created in 1972.
Windfield International College was created in 2005.
Dulwich International College was created in 1996.
College Prep International was created in 1944.
International Baptist College was created in 1981.
The International College of Surgeons was created in 1935.
Miyazaki International College was created in 1939.
International College Portsmouth was created in 2009.
Underwood International College was created in 2005.
International Pacific College was created in 1990.
Melior International College was created in 2007.