12th MARINE CORPS DISTRICT

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RECRUITING STATION  LOS ANGELES
Official U.S. Marine Corps Web Site
GROUND
This is the backbone of the Marine Corps.  We respond with decisive force to assert combat power and establish battlefield dominance in support of our overall mission and our nation.  Protecting that legacy requires you to act quickly, and think even faster.  Our primary mission is close combat, so this is where the majority of Marines operate.  From the beginning of every mission to its conclusion, each Marine in your command looks to you for instruction and guidance.  It's a take-charge job with a lot at stake, but that's the essence of leadership in the Corps.  

After your commission and following successful graduation from The Basic School (TBS) all ground officers will be designated a specific Military Occupational Specialty (MOS).  Every MOS falls within one of the following categories:

  • AVIATION 
  • COMBAT ARMS
  • COMBAT SERVICE SUPPORT

AVIATION
  • Aviation Intelligence 
  • Aviation Maintenance 
  • Air Support Control 
  • Air Defense Control 
  • Air Traffic Control 
  • Aviation Supply 

COMBAT ARMS
  • Infantry
  • Field Artillery
  • Tank
  • Combat Engineer
  • Assault Amphibian Vehicle​
COMBAT SERVICE SUPPORT
  • Ground Intelligence
  • Human Source Intelligence
  • Signals Intelligence
  • Logistics
  • Communications Systems
  • Military Police 
  • Public Affairs
  • Ground Supply
  • Adjustant​