The 1st Marine Division is a marine infantry division of the United States Marine Corps. It is a subordinate unit of the I Marine Expeditionary Force (I MEF).
It is the oldest and largest active duty division in the United States Marine Corps, representing a combat-ready force of more than 19,000 men and women. It is one of three active duty divisions in the Marine Corps today and is a multi-role, expeditionary ground combat force. The 1st Marine Division appears in Battlefield Vietnam and Battlefield 3.
The 1st Marine Division appears again in Battlefield 3. Players take the role of at least two members of the division: Staff Sergeant Henry "Black" Blackburn from the 1st Reconnaissance Battalion and Sergeant Jonathan "Jono" Miller from the 1st Tank Battalion.