A U.S. Marine from Detachment 18, Marine Medium Tiltrotor Squadron 262, 31st Marine Expeditionary Unit, writes a receipt for fuel during joint training at Kadena Air Base, Japan, March 11, 2021. Working together to support one mission, the U.S. Air Force provided the area and fuel for the training, while the Marines brought the mobilized portable fuel system and E-2D Hawkeye aircraft. With different operating procedures and technical jargon between services, this type of joint training is vital to working together during real-world operations. (U.S. Air Force photo by Airman 1st Class Anna Nolte)