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A string of previously undisclosed break-ins at Tennessee National Guard armories last fall marks the latest in a growing series of security breaches at military facilities across the United States, raising fresh concerns about the vulnerability of US armories to theft and intrusion.
A confidential memo from the Tennessee Fusion Center reviewed by WIRED details four break-ins at Tennessee National Guard armories over a seven-week span. In one incident, thieves made off with night vision goggles, laser target locators, and thermal weapons sights, among other equipment. At others, intruders breached fences, tripped alarms, and gained access to supply rooms discovered in the aftermath to have been unlocked.
At least some of the break-ins seem to point to potential insider help. In Covington, Tennessee, for example, evidence suggests intruders may have known in advance the location of a secure key control box. At other sites, attempts were made to bypass alarms and entry points.
The memo, which was intended solely for law enforcement use, does not indicate that any weapons were stolen; however, a government anti-terrorism coordinator is quoted as saying: “These events are concerning not only due to the stolen items being sensitive in nature but also because of the indicators for some insider knowledge being needed for successful breach and theft.”
The document, first obtained by the nonprofit watchdog group Property of the People, was shared exclusively with WIRED.
The break-ins remain under active investigation and have drawn the attention of the Pentagon’s Office of the Provost Marshal General—the US Army’s leading law enforcement authority. A senior police source informed WIRED on Tuesday that the Federal Bureau of Investigation is leading the investigation. The FBI declined to confirm.
“FBI policy prohibits confirming or denying an investigation unless in rare circumstances when publicity would help the investigation, such as in seeking a missing child or trying to identify a bank robber,” Elizabeth Clement-Webb, an FBI public affairs officer, says. “The matter you’re inquiring about does not meet that exception, so it would not be appropriate to comment.”
The Pentagon referred questions to the National Guard. The Guard did not respond to a request for comment.
Initially regarded as isolated incidents, the memo cites years’ worth of FBI and Defense Department reporting on what agents call “domestic violent extremists,” or DVEs, discussing plans to raid armories for weapons and gear, leading analysts to suspect organized activity. Domestic intelligence has consistently flagged violent militia members and racially motivated extremists eyeing armories as soft targets.
“Although DVEs previously have stolen some lower-level military gear, the FBI has not identified any instances in which a DVE successfully raided an armory to steal heavy military equipment,” the memo reads. “To circumvent such a raid, FBI and DoD are enhancing liaison with local armories and military facilities to address gaps in reporting about current plots to exploit armory vulnerabilities and increase opportunities to detect and prevent DVE theft of military equipment.”
Between 2020 and 2024, the memo says, at least four FBI subjects discussed raiding military facilities for heavy weapons, including .50-caliber firearms and machine guns. Three had confirmed military backgrounds. One—a former Guard member—identified specific armories that he had served in, while describing how best to exploit their security. It’s unclear whether any charges were brought.
Extremist chatter cited by the document echos these ambitions. In early 2024, a militia-linked Telegram user proposed assessing armory vulnerabilities with help from sympathetic firefighters and sought military or law enforcement recruits for inside information. In another case, an active-duty tank commander claimed he could sway an armorer to hand over weapons, while a former Air Force contractor talked about raiding a Guard facility to seize mortars and secure land.
