UAS groups of the United States military

Lore & Background

From about 2004 to 2011, U.S. military planners used various Tier systems to designate roles for integrated operations, with each service branch developing its own. The U.S. Air Force defined Tier N/A (small/micro UAV, role filled by BATMAV/Wasp Block III), Tier I (low altitude, long endurance, role filled by Gnat 750), Tier II (MALE, role filled by Predator and MQ-9 Reaper), Tier II+ (HALE, role filled by RQ-4 Global Hawk), and Tier III- (high altitude, long endurance low-observable, role originally intended for RQ-3 DarkStar before its termination, now filled by RQ-170 Sentinel). The U.S. Marine Corps used Tier N/A (micro UAV, Wasp III), Tier I (role filled by Dragon Eye, transitioning to RQ-11B Raven B), Tier II (role filled by Scan Eagle and RQ-7 Shadow), and Tier III (medium range tactical UAV, formerly Pioneer, now RQ-7 Shadow, though planners did not view it as meeting future requirements). The U.S. Army employed Tier I (small UAV, RQ-11A/B Raven), Tier II (short range tactical UAV, RQ-7A/B Shadow 200), and Tier III (medium range tactical UAV, formerly MQ-5A/B Hunter and IGNAT/IGNAT-ER, transitioned to MQ-1C Gray Eagle). The Army's Future Combat Systems program, active from 2003 to early 2009, proposed four UAS classes: Class I (for small units, to be filled by a new UAV similar to a Micro Air Vehicle), Class II (for companies, cancelled), Class III (for battalions, cancelled), and Class IV (for brigades, to be filled by RQ-8A/B / MQ-8B Fire Scout).

Reader's Guide

The adoption of the joint Group system in 2011 marked a shift from the fragmented tier-based approaches of the Air Force, Marine Corps, and Army to a unified classification across the Department of Defense. The earlier tier systems reflected each service's operational priorities: the Air Force emphasized endurance and altitude (from small/micro UAVs to high-altitude low-observable platforms), the Marine Corps focused on tactical roles from micro to medium range, and the Army structured its tiers around unit echelons from small to medium range. The Army's Future Combat Systems program, though cancelled, proposed a class structure aligned with unit levels. The Group system's five categories provide a common framework for procurement, training, and joint operations, superseding the service-specific tiers that had been in use since around 2004. The transition from the Pioneer to the RQ-7 Shadow in the Marine Corps and from the Hunter to the MQ-1C Gray Eagle in the Army illustrate the evolution of tactical UAS within these classification schemes. The joint system remains the standard for describing UAS capabilities across the U.S. military.

Did You Know?

• The U.S. Department of Defense replaced separate service branch UAS categorization schemes with a joint five-group system in 2011.
• The U.S. Air Force's Tier III- role, originally intended for the RQ-3 DarkStar, is now filled by the RQ-170 Sentinel.
• The U.S. Marine Corps retired the Pioneer UAV after two decades of service and transitioned to the RQ-7 Shadow for its Tier III role.
• The Army's Future Combat Systems program proposed four UAS classes, but Classes II and III were cancelled.