My Infantry NG company was conducting a company air assault at Ft. Hood.  One of my cadets (acting as a rifleman) took a picture of himself sitting on the UH60 and used Snapchat to send it to his friends.  Throughout the ground movement he sent photos and left his geo-location turned on.  And, since the OPFOR was made up of HHC cadets, they (and the BC standing with them) were able to track his PLT’s movement within 10m.  As a result, our company got waxed.

This was a failure at many levels, but it was a prime example of an OPSEC violation getting Soldiers killed.  Our great plan and undetected movement was thwarted by one guy with a phone in his pocket.

This cadet, as a piece of his corrective training, now manages our unit social media accounts.