U.S. Marines with Combat Logistics Battalion 453, 4th Marine Division, prepare to conduct an animal pack hike during Mountain Training Exercise 4-23 at Marine Corps Mountain Warfare Training Center, Bridgeport, California, June 16, 2023. The animal packing portion of MTX is designed to teach Marines an alternate form of transportation that can be used to traverse mountainous terrain when other resources are not available. (U.S Marine Corps photo by Lance Cpl. Samwel Tabancay)