Semper Fidelis is the U.S. Marines’ motto – “always faithful.” Perhaps an ironic twist of phrase in the context of its recent and preventable data breach. Let’s recap. The Marine Forces Reserve recently announced that personal information of over 21,000 Marines, sailors, and civilians were “compromised.” The PI included social security numbers, bank account and routing numbers, card information, name, address and other contact information. In other words, PI which is a treasure trove for identity thieves. Some of the PI may have been redacted in part. How did this breach occur? The culprit was an e-mail incorrectly sent with an unencrypted attachment. The email was sent out by the Defense Travel System which manages travel itineraries and expense reimbursement. Obviously sensitive location information is also in play. Probably not a big thing for a travelling salesperson, but highly problematic for defense sector travel.