| 397th Engineer Battalion | |
|---|---|
&sq=&lang=&file=File:397th_EN_BN_Unit_Crest.jpg) 397th Engineer Battalion Unit Crest | |
| Active | 15 August 1942 – Present |
| Country | United States |
| Allegiance | United States Army |
| Branch | US Army Reserve |
| Role | Engineers |
| Size | Battalion |
| Garrison/HQ | Marina, California |
| Commanders | |
| Commander | LTC Christopher Smiley |
| Command Sergeant Major | CSM Russell Moore |
The 397th Engineer Battalion is a multi-role engineer battalion of the United States Army based in Marina, California. Activated 18 May 1959 at Eau Claire, the battalion traces its lineage back to World War II. It is a United States Army Reserve formation and is subordinate to the 301st Maneuver Enhancement Brigade at Joint Base Lewis McCord WA.