U.S. Marines with 3rd Battalion, 3rd Marine Regiment, a part of Marine Rotational Force - Darwin, fire an M252 81 mm extended range mortar system during a fire support coordination exercise at Mount Bundey Training Area, Australia, August 9, 2019.
MRF-D increases interoperability and strengthens the alliance between the U.S. and Australia. (U.S. Marine Corps photo by Lance Cpl. Nicholas Filca). Original public domain image from Flickr