ROYAL AUSTRALIAN AIR FORCE BASE, Darwin – U.S. Marines with 3rd Battalion, 4th Marine Regiment, Marine Rotational Force Darwin 17.2 (MRF-D), share their excitement to be in Australia, April 18, 2017. More than 200 Marines arrived as part of the first wave of MRF-D personnel. A total of 1250 Marines are expected take part in this year’s rotation.  (U.S. Marine Corps photo by Sgt. Emmanuel Ramos)