Personal information of almost 40k Marines made public by accident

U.S. Marine Corps Col. John S. McCalmont, commanding officer of Combat Logistics Regiment 17, 1st Marine Logistics Group, speaks to Marines about unit cohesion and exercise at Camp Pendleton, Calif., Sept. 24, 2021. The formation run was held to boost morale and camaraderie throughout the regiment. (U.S. Marine Corps photo by Lance Cpl. Kristy Ordonez Maldonado)

The personal identifiable information of approximately 39,000 Marines, sailors, and Defense Department civilians was inadvertently leaked by a US Marine Corps unit, according to defense sources.

The majority of those affected are assigned to the I Marine Expeditionary Force, USMC officials confirmed.

“At this time there is no indication that any PII [personal identifiable information] has reached anywhere other than official government channels,” I MEF spokesman 2nd Lt. Sean Waterman, told Task & Purpose. “To be clear, nothing was hacked.”

On May 9, Combat Logistics Regiment 17 sent an email to 250 Defense Travel System travel administrators.

All DTS admins were later told to delete the message.

“The email included variations of the following traveler PII: full names, last four digits of Social Security Numbers, Electronic Data Interchange Personal Identifiers (EDIPI), email addresses, residential and mailing addresses, personal phone numbers, last six digits of government travel card numbers and expiration dates, checking account and routing numbers, and savings account and routing numbers,” Waterman said.

The mistake went unnoticed for three days.

In response, memos have been sent out for those affected.

“While there is no evidence to suggest personal data has been misused, it is the Department of the Navy policy to apprise individuals who may have had personal data compromised,” the May letter from Combat Logistics Regiment 17 Colonel John McCalmont reads. “We recommend you visit the Federal Trade Commission’s website at: for guidance on protective action.”

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