| 35th Engineer Brigade | |
|---|---|
 35th Engineer Brigade shoulder sleeve insignia | |
| Active | 1928 - 1944, 1946 - Present |
| Country | United States |
| Allegiance | United States Army |
| Branch | Missouri Army National Guard |
| Type | Combat Engineer |
| Size | Brigade |
| Garrison/HQ | Fort Leonard Wood, Missouri |
| Motto(s) | No Task Too Large |
| Engagements | |
| Commanders | |
| Notable commanders | Richard D. Dean |
The 35th Engineer Brigade is a combat engineer brigade of the Missouri Army National Guard, located at Fort Leonard Wood, Missouri.
As an Army National Guard formation, the 35th Engineer Brigade is commanded by the Governor of Missouri during peacetime, but it can be mobilized for federal service under the authority of the President of the United States. The brigade’s lineage is tied to units of the historic 35th Infantry Division, which has long included both Kansas and Missouri Army National Guard elements, although the brigade itself is not currently assigned to the division.
The brigade is headquartered at Fort Leonard Wood, Missouri, and consists of its Headquarters and Headquarters Company (HHC), two engineer battalions, and several supporting units. Its primary subordinate formations are:
The 35th Engineer Brigade was originally organized on 17 July 1928 in St. Louis, Missouri, as the Headquarters Company, 1st Battalion, 138th Infantry Regiment. It was redesignated on 1 May 1940 as the Headquarters Detachment, 1st Battalion, 138th Infantry and inducted into federal service on 23 December 1940. On 1 March 1942, the 138th Infantry was relieved from the 35th Infantry Division, and on 1 April 1942 the detachment was again redesignated as the Headquarters Company, 1st Battalion, 138th Infantry. The regiment was inactivated on 20 July 1944 at Camp Shelby, Mississippi [1] .
On 20 June 1946, the 138th Infantry was reassigned to the 35th Infantry Division, and the 1st Battalion Headquarters Company was reorganized and federally recognized on 22 October 1946 at St. Louis. Subsequent reorganizations included conversion to the 101st Replacement Group in 1959, the Combat Command Section, 35th Command Headquarters in 1963, and finally consolidation with the 1135th Ordnance Company in 1968. On 15 January 1968, the consolidated unit was redesignated as the Headquarters and Headquarters Company, 35th Engineer Brigade.
The brigade received its Distinctive Unit Insignia in 1970 and retained the 35th Infantry Division–derived Shoulder Sleeve Insignia until 1984.
Throughout its history, the 35th Engineer Brigade has provided command and control of combat engineer units for both federal deployments and state emergency missions. The brigade regularly prepares Missouri Army National Guard engineer units for mobilization, supports State Emergency Duty (SED) during natural disasters, and can augment joint task forces across a range of military operations .
One notable state mission occurred in 2011, when the brigade mobilized in response to the EF-5 tornado in Joplin, Missouri, providing disaster response and security support during recovery operations .
The brigade has also overseen major training projects. In 2000, it was tasked with managing Operation Alaskan Road, an Innovative Readiness Training project that constructed a 14.8-mile, $33 million road across Annette Island, Alaska, linking the town of Metlakatla to the island’s north side .
The brigade headquarters deployed overseas during Operation Iraqi Freedom in 2005, where it supported the 20th Engineer Brigade with combat construction and engineer operations. It returned to Iraq in 2007–2008, operating in the Baghdad area under Multi-National Division–Baghdad, where missions included combat engineering, route clearance, and humanitarian projects .
In 2018–2019, the brigade deployed again, this time to Kuwait under Operation Spartan Shield, where it served as the engineer headquarters for Task Force Spartan, overseeing construction, infrastructure development, and force protection projects across the U.S. Central Command area of responsibility [2] .
Most recently, in 2025, elements of the brigade participated in Beyond the Horizon, a multinational humanitarian and training exercise in Guatemala and Honduras, working with allied partners to provide engineering support and infrastructure development.