The Marines of 1st Battalion, 5th Marines memorialized their fallen at Camp Pendleton Feb. 5, 2010. The battalion lost four Marines during a deployment to Afghanistan's Helmand Province in the latter half of 2009. Killed in action were: Sgt. William J. Cahir, Lance Cpl. Donald J. Hogan, Lance Cpl. David R. Baker, and Lance Cpl. Justin J. Swanson.