3,300 soldiers, in the pre-2013 design, which did not include the 3rd maneuver battalion. The 2013 end-strength is now 4,413 Soldiers: Special Troops Battalion (now Brigade Engineer Battalion) Cavalry Squadron (2), later (3) Infantry Battalions Field Artillery Battalion Brigade Support Battalion Stryker Brigade Combat Team or SBCTs comprised about 3,900 soldiers, making it the largest of the three combat brigade constructs in the 2006 design, and over 4,500 Soldiers in the 2013 reform. Its design includes: Headquarters Company Cavalry Squadron (with three 14-vehicle, two-120 mm mortar reconnaissance troops plus a surveillance troop with UAVs and NBC detection capability) (3) Stryker infantry battalions (each with three rifle companies with 12 infantry-carrying vehicles, 3 mobile gun platforms, 2 120 mm mortars, and around 100 infantry dismounts each, plus an HHC with scout, mortar and medical platoons and a sniper section.) Engineer Company (folded into the Brigade Engineer Battalion) [An additional engineer company was added to the battalion in the 2013 reform] Signal Company (folded into the Brigade Engineer Battalion) Military Intelligence Company (with UAV platoon) (folded into the Brigade Engineer Battalion) Anti-tank company (9 TOW-equipped Stryker vehicles) (folded into the Brigade Engineer Battalion) Field Artillery Battalion (three 6-gun 155 mm Howitzer batteries, target acquisition platoon, and a joint fires cell) Brigade Support Battalion (headquarters, medical, maintenance, and distribution companies) Modular support brigades Combat support brigades Similar modularity will exist for support units which fall into five types: Aviation, Fires (artillery), Battlefield Surveillance (intelligence), Maneuver Enhancement (engineers, signal, military police, chemical, and rear-area support), and Sustainment (logistics, medical, transportation, maintenance, etc.). In the past, artillery, combat support, and logistics support only resided at the division level and brigades were assigned those units only on a temporary basis when brigades transformed into "brigade combat teams" for particular deployments. Combat Aviation Brigades are multi-functional, offering a combination of attack helicopters (i.e., Apache), reconnaissance helicopters (i.e., Kiowa), medium-lift helicopters (i.e., Blackhawks), heavy-lift helicopters (i.e., Chinooks), and medical evacuation (MEDEVAC) capability. Aviation will not be organic to combat brigades. It will continue to reside at the division-level due to resource constraints. Heavy divisions (of which there are six) will have 48 Apaches, 38 Blackhawks, 12 Chinooks, and 12 Medevac helicopters in their aviation brigade. These are divided into two aviation attack battalions, an assault lift battalion, a general aviation support battalion. An aviation support battalion will have headquarters, refuelling/resupply, repair/maintenance, and communications companies. Light divisions will have