An active-duty soldier stationed at Texas’s Fort Bliss was arrested Wednesday in El Paso on charges of espionage for allegedly attempting to transmit national defense information about United States tanks to Russia.

The Justice Department announced that Taylor Adam Lee, 22, who held a top-secret security clearance, allegedly tried to share sensitive information about the U.S. Army’s M1A2 Abrams tank with someone he believed represented the Russian government. He is accused of passing an SD card filled with controlled technical data and classified material during a July meeting, later delivering what appeared to be tank hardware and texting “Mission accomplished.”