carrier and multiple types of Mine Resistant Ambush Protected (MRAP) vehicles. The U.S. Army's principal artillery weapons are the M109A6 Paladin self-propelled howitzer and the M270 Multiple Launch Rocket System (MLRS), both mounted on tracked platforms and assigned to heavy mechanized units. Aviation While the United States Army Aviation Branch operates a few fixed-wing aircraft, it mainly operates several types of rotary-wing aircraft. These include the AH-64 Apache attack helicopter, the UH-60 Black Hawk utility tactical transport helicopter and the CH-47 Chinook heavy-lift transport helicopter. Restructuring plans call for reduction of 750 aircraft and from 7 to 4 types. The Army is evaluating two fixed-wing aircraft demonstrators; ARES, and Artemis are under evaluation to replace the Guardrail ISR (Intelligence, surveillance and reconnaissance) aircraft. Under the Johnson-McConnell agreement of 1966, the Army agreed to limit its fixed-wing aviation role to administrative mission support (light unarmed aircraft which cannot operate from forward positions). For UAVs, the Army is deploying at least one company of drone MQ-1C Gray Eagles to each Active Army division. Uniforms The Army Combat Uniform (ACU) currently features a camouflage pattern known as Operational Camouflage Pattern (OCP); OCP replaced a pixel-based pattern known as Universal Camouflage Pattern (UCP) in 2019. On 11 November 2018, the Army announced a new version of 'Army Greens' based on uniforms worn during World War II that will become the standard garrison service uniform. The blue Army Service Uniform will remain as the dress uniform. The Army Greens are projected to be first fielded in the summer of 2020. Berets The beret flash of enlisted personnel displays their distinctive unit insignia (shown above). The U.S. Army's black beret is no longer worn with the ACU for garrison duty, having been permanently replaced with the patrol cap. After years of complaints that it was not suited well for most work conditions, Army Chief of Staff General Martin Dempsey eliminated it for wear with the ACU in June 2011. Soldiers who are currently in a unit in jump status still wear berets, whether the wearer is parachute-qualified or not (maroon beret), while members of Security Force Assistance Brigades (SFABs) wear brown berets. Members of the 75th Ranger Regiment and the Airborne and Ranger Training Brigade (tan beret) and Special Forces (rifle green beret) may wear it with the Army Service Uniform for non-ceremonial functions. Unit commanders may still direct the wear of patrol caps in these