The ground combat element (GCE) consists of those combat and combat support units whose primary mission is to, (1) engage with and destroy the enemy by fire and/or maneuver, and/or shock effect, performed by infantry, field artillery, and tank units, (2) provide close battlefield support to other GCE units by assault amphibian, combat assault, light armored reconnaissance, reconnaissance, and combat engineer units, or (3) provide immediate command and control, and limited logistical support including consolidated Navy personnel administration and motor transport (medium truck) support to subordinate GCE battalions and regiments (infantry and artillery only) by Marine division (MARDIV) headquarters battalions. Additionally, this battalion provides communications networking and law enforcement support across the GCE. The headquarters battalion also includes the division band, whose tactical mission is to serve as a provisional rifle platoon in providing division headquarters security.