91st Cyber Brigade
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| 91st Cyber Brigade | |
|---|---|
 | |
| Active | 2017 - present |
| Country |  United States |
| Allegiance |  Virginia Army National Guard |
| Branch |  United States Army National Guard |
| Type | Cyber |
| Size | Brigade |
| Part of |  United States Army Cyber Command |
| Garrison/HQ | Fort Belvoir, Virginia |
| Motto | UMBRA BELLATORES (Shadow Warriors) |
| Commanders | |
| Current commander | Col. Gerald Mazur |
| Insignia | |
| 91st Cyber Brigade DUI |  |
The 91st Cyber Brigade the "Shadow Brigade" is a unit of the Army National Guard since September 2017 stationed at Fort Belvoir, Va.[1] The Brigade's mission is to provide training and readiness in cyber security and operational control in the cyber realm.[2] In March 2025, the brigade direct commissioned Robert M. Lee[3] (CEO and co-founder of Dragos)[4] at the rank of Lieutenant Colonel in the billet of executive officer of the Information Operations Support Center at Fort Belvoir similar to the Detachment 201 commissioning ceremony in June, 2025.
