A CH-53E Super Stallion hovers over an M777 Howitzer where Marines with Landing Support Platoon, Truck Support Company, Combat Logistics Battalion 5, prepare to attach an M777 Howitzer to a CH-53E Super Stallion as it hovered over the gun during Exercise Steel Knight 2015 at Marine Corps Air Ground Combat Center Twenty-nine Palms, Calif., Dec. 9, 2014. The exercise gave the Marines the opportunity to refine and rehearse essential skills needed in a combat environment. Steel Knight is an annual exercise that includes elements from the entire I Marine Expeditionary Force. The exercise focuses on conventional operation and provides realistic training that prepares Marine for overseas operations. - A CH-53E Super Stallion hovers over an M777 Howitzer where Marines with Landing Support Platoon, Truck Support Company, Combat Logistics Battalion 5, prepare to attach an M777 Howitzer to a CH-53E Super Stallion as it hovered over the gun during Exercise Steel Knight 2015 at Marine Corps Air Ground Combat Center Twenty-nine Palms, Calif., Dec. 9, 2014. The exercise gave the Marines the opportunity to refine and rehearse essential skills needed in a combat environment. Steel Knight is an annual exercise that includes elements from the entire I Marine Expeditionary Force. The exercise focuses on conventional operation and provides realistic training that prepares Marine for overseas operations.