About 850 Marines headed to the remote Australian outback to test the capabilities of a training range as the U.S. prepares to deploy a battalion-landing team-sized unit there next year. Exercise Koolendong 2013 kicked off on Tuesday at Bradshaw Field Training Area outside Darwin, Australia. The two-week long exercise will be conducted with about 1,000 Australian and U.S. troops. It is designed to assess the capabilities of the training field to accommodate live-fire training for a battalion-sized unit, according to a Marine Corps news release. Included are about 700 members of the 31st Marine Expeditionary Unit, based out of Japan,…