The 863rd Engineer Battalion is a United States Army unit specializing in engineer operations. These military engineers are responsible for construction, demolition, and roadbuilding tasks to support troops and facilitate the movement of military equipment. They also perform route clearance duties to ensure safe passage for convoys, as well as conducting various types of surveying and mapping activities. The 863rd Engineer Battalion is a critical component in providing mobility, counter-mobility, and survivability support to the Army and its mission.