1st Reconnaissance Battalion, USMC | 2,258 followers on LinkedIn. 1st Reconnaissance Battalion (abbreviated as 1st Recon Bn) is a reconnaissance battalion in the United States Marine Corps, 1st Marine Division, I Marine Expeditionary Force (I MEF). The following are examples of missions outlined to 1st Reconnaissance Battalion: • Plan, coordinate, and conduct amphibious-ground reconnaissance and surveillance to observe, identify, and report enemy activity, and collect other information of military significance. • Conduct specialized surveying to include: underwater reconnaissance and/or demolitions, beach permeability and topography, routes, bridges, structures, urban/rural areas, helicopter landing zones (LZ), parachute drop zones (DZ), aircraft forward operating sites, and mechanized reconnaissance missions. • Infiltrate mission areas by necessary means to include: surface, subsurface and airborne operations. • Conduct counter-reconnaissance. • Designate and engage selected targets with organic weapons and force fires to support battlespace shaping.