1908 Schofield Army Barracks was established to provide a base for the Army's mobile defense of Pearl Harbor and the island of Oahu.

Until the 1920s Schofield Barracks had been garrisoned by infantry, cavalry, and artillery regiments.

1920s Regiments were joined by units from a signal battalion, ordnance company, ammunition team, tank company, medical regiment, maintenance squadron, and a chemical gas unit. These types of units, excluding the chemical warfare function, characterize the activities of Schofield Barracks to the present day.

1940s Following the Japanese attack of Pearl Harbor, Hawaii became a critical supply base and command center during the war in the Pacific. Training camps, including the Jungle Training Center, were established to teach close-in fighting, map reading, and jungle-warfare techniques. Following World War II (WWII), Schofield Barracks' soldiers were employed in the disposal of surplus war goods.

1945 Records indicate the storage of chemical munitions on the post includes mustard (H), lewisite (L), cyanogen chloride (CK), and hydrocyanic acid (AC). All remaining stocks were removed and disposed of by deep-sea burial.

1984 An installation assessment (IA) found no records indicating past disposal of chemical warfare materiel (CWM) on Schofield Barracks. The IA reported a major disposal operation that removed all chemical agent munitions from Schofield Barracks storage areas for deep-sea burial in 1945. An account of liquid-filled Stokes mortar rounds being found and exploded in-place in the central range area was not confirmed during the IA.

1992 A preliminary assessment/site inspection efforts conducted found no records indicating past disposal of CWM on Schofield Barracks.

Records indicate the storage of chemical munitions on the post includes mustard (H), lewisite (L), cyanogen chloride (CK), and hydrocyanic acid (AC). All remaining stocks were removed and disposed of by deep-sea burial in 1945.

Chemical agent identification sets were stored and used for training purposes. Records were not located to indicate if any chemical agents were used during warfare maneuvers.