1941 Camp Crowder was established during World War II (WWII) on 43,000 acres.

1942 - 1946 Camp Crowder operated as a Signal Corps Replacement Training Center. Three gas chambers were built and used to train troops in the identification of war gases (tear gas and CAIS). This is the only CWM known to be used at Camp Crowder.

1946 - 1951 Camp Crowder was deactivated.

1953 - 1958 Camp Crowder was reactivated as an Army Reception Center for the Korean conflict and re-designated as a U.S. Branch Disciplinary Barracks.

1958 - 1967 Approximately 3,700 acres of the camp was used as U.S. Air Force Plant 65.

1940s - 1970s The majority of land was excessed at various times. Currently, Camp Crowder consists of approximately 4,300 acres. It is owned by the Army and licensed to the State of Missouri for training by Missouri Army National Guard and other units. National Guard Bureau (NGB) is conducting the Installation Restoration Program (IRP) on the current Camp Crowder property. The Corps of Engineers FUDS Program is responsible for the excessed property.

1981 Guardman exposed to unidentified substance while working at former Camp Crowder.

1986 The Technical Escort Unit (TEU) responded to an incident at MoArk Production property and uncovered 30 glass vials belonging to CAIS that were found to contain H, L, PS, and CG. The CAIS items were found along with fuzes and other DoD materials.

The ASR identified three sites on Former Camp Crowder that potentially contained CWM. The Magazine Area is on current Camp Crowder property, and is an IRP site. The Patrol/Infiltration Area spans both current and excessed property, and the portion on current Camp Crowder property is an IRP site. The Gas Chamber #110 is on excessed property, and is a FUDS site. "