The U.S. Defense Department has released the names of the three Marines killed when an improvised explosive device was detonated near Bagram Air Base near Kabul in Afghanistan on Monday.

Staff Sgt. Christopher K.A. Slutman, 43, of Newark, Delaware; Sgt. Benjamin S. Hines, 31, of York, Pennsylvania; and Cpl. Robert A. Hendriks, 25, of Locust Valley, New York were killed by the blast.

All three of these Marines were assigned to the 25th Marine Regiment out of Fort Devens, Massachusetts, a reserve command that falls under the Fourth Marine Division. I’m particularly familiar with that command, as I served as the personnel chief for 25th Marines between 2009 and late in 2012, when I was medically retired from service.