Brush Cover A Marine provides security during a simulated platoon attack as part of Exercise Southern Jackaroo at Shoalwater Bay Training Area, Australia, May 23, 2019. Southern Jackaroo is a trilateral exercise with forces from Australia, Japan and the U.S. SHARE: Download: Full Size (1.46 MB) Tags: Exercises, partnerships, Southern Jackaroo, training, Marine Corps Credit: Marine Corps Staff Sgt. Jordan Gilbert VIRIN: 190523-M-RB959-0022.JPG Photo Gallery