U.S. Army Sgt. 1st Class Michael James Goble, who was killed during combat operations in Kunduz province, Afghanistan, on Sunday. U.S. Army/Department of Defense hide caption toggle caption U.S. Army/Department of Defense National Security 20th American Service Member Killed In Deadly Year For U.S. In Afghanistan December 24, 2019 The death of an American Green Beret on Monday raised the tally of U.S. forces killed in action in Afghanistan to 20 this year, the highest since combat operations officially ended in 2014.