The marine tested positive for the virus while in quarantine after arriving in Darwin on a charter flight and is being transferred to Royal Darwin Hospital.

NT Health Minister Natasha Fyles said the marine arrived in the Northern Territory "a few days ago" and disembarked through the military side of Darwin Airport.

Ms Fyles said the marine has potentially had "very, very minimal contact" with any Territorians.

The marine was in Darwin as part of the annual Marine Rotational Force hosted in the Northern Territory.

The original rotation of about 2,500 marines was postponed in March due to the coronavirus pandemic. Defence Minister Linda Reynolds gave approval for the reduced contingent in May.

Facing what a Trump administration official recently called "the most significant geopolitical challenge since the end of the Cold War" in the Indo-Pacific theater, the U.S. military will embark on a realignment of its global posture.

Several thousand of the troops currently posted in Germany are expected to redeploy to American bases in Guam, Hawaii, Alaska, Japan and Australia.

The 9,500 who are leaving will be reassigned elsewhere in Europe, redeployed to the Indo-Pacific region, or sent back to bases in the U.S.

The Australian government has cancelled a number of defence projects – including a “roll-on, roll-off wharf” in Darwin and new air-to-air refuellers – as it sharpens the military’s focus on deterring threats in an increasingly uncertain Indo-Pacific region.

The force structure plan reveals the government is dumping several proposals that were included in the 2016 white paper but “are no longer required”.

These include a roll-on, roll-off wharf in Darwin to load heavy vehicles and cargo on to Australia’s two Canberra-class amphibious ships.

It has also scrapped the “northern advanced joint training area” – a proposal for a site for large-scale, joint and combined amphibious training exercises and a potential rail link to RAAF Base Tindal, near Katherine in the Northern Territory, to transport explosive ordnance and bulk fuel.

But the government says it will still meet a pledge to invest $8bn in northern Australia over 10 years.

This year’s deployment to Darwin, in Australia’s Northern Territory, hasn’t gone as initially planned. Travel restrictions and quarantining requirements due to the novel coronavirus drove the Marine Corps to send a smaller, 1,200-member force for the rotational deployment program, now in its ninth year. That’s less than half the size that deployed in 2019, the first time Marine Rotational Force-Darwin reached its 2,500-personnel maximum.

The deployment will culminate in exercise Koolendong in September with Australian Defence Force units.

The Marines will be in quarantine for two weeks, where they also will be tested twice for the potentially deadly COVID-19 virus.

Just before the newest wave of Marines showed up to Australia, Marines in the first wave of “approximately 200″ Marines were released from the quarantine facility, according to Chuck Little, deputy director of communication strategy and operations for U.S. Marine Corps Forces, Pacific. All Marines in the first wave tested clean from the virus, according to the Marine Corps.

“At the end of the day all it did was delay the deployment a little bit and force us to take a little harder look at how we were going to implement the necessary health protective measures,”