The US Marine Rotational Force Darwin 2020 has completed its ninth rotation in the NT.

The MRF-D has departed after undertaking a range of exercises, which strengthened cooperation and interoperability with the Australian Defence Force.

The 1100 US Marines arrived in a series of tranches and completed a mandatory 14-day quarantine, prior to starting their training; and, were tested for COVID-19 on entry to Australia and a second time prior to exiting quarantine.

One of the Marines tested positive for coronavirus while in quarantine.

Planning is underway for the next year's MRF-D, which will mark its 10-year anniversary.