•
48th Chemical Brigade,
Fort Hood (TX) • Headquarters and Headquarters Company, Fort Hood (TX) •
2nd Chemical Battalion, Fort Hood (TX) • Headquarters and Headquarters Company, Fort Hood (TX) • 63rd Chemical Company,
Fort Campbell (KY) • 172nd Chemical Company,
Fort Riley (KS) • 181st Chemical Company, Fort Hood (TX) • •
22nd Chemical Battalion,
Fort Bliss (TX) • Headquarters and Headquarters Company, Fort Stewart (GA) • 21st Chemical Company,
Fort Bragg (NC) • 25th Chemical Company (Tech Escort), Fort Stewart (GA) • 51st Chemical Company, Fort Stewart (GA) • 59th Chemical Company,
Fort Drum (NY) • 92nd Chemical Company, Fort Stewart (GA) • •
110th Chemical Battalion,
Joint Base Lewis–McChord (WA) • Headquarters and Headquarters Company, Joint Base Lewis–McChord (WA) • 9th Chemical Company (Tech Escort), Joint Base Lewis–McChord (WA) • 11th Chemical Company (Tech Escort), Joint Base Lewis–McChord (WA) • 45th Chemical Company, Joint Base Lewis–McChord (WA) The 83rd Chemical Battalion was formerly the 83rd Chemical Mortar Battalion, which fought with the 1st, 3rd, and 4th Ranger Battalions in North Africa, Sicily, and Italy until those three battalions were destroyed during
Operation Shingle. They were part of the 6615th Ranger Force which also included the 509th Parachute Infantry Battalion. The lineage of the 2nd Chemical Battalion (CBRN) goes back to the 30th Engineer Regiment (Gas and Flame), formed in 1917. The battalion and its predecessor units fought in World War I, World War II, the Korean War, Operation Desert Storm, and Operation Iraqi Freedom. ==Commanders==