27/4/2012 · UPDATED 27 April 2012 Darby All Terrain All-purpose Cart-Sleds (ATACS) YES! Carts on trial with U.S. Army Soldiers Systems Command, Natick, MA details here and the U.S. Army Infantry School, Fort Benning, GA The "Darby" All Terrain All-purpose Cart-Sled (ATACS) is a combination of the UT 2000 stretcher system, Custom by dozens of allied armies made by Ferno MILITARY PRODUCTS;