As tensions between the US and China continue to simmer, researchers say the Biden administration could put a strategic spotlight directly on the NT's capital, given its proximity to Asia.

"There will probably be a rotational agreement like what we see with the Marines and the Air Force, but with some US Navy warships," Mr Thomas-Noone told ABC Radio Darwin.

Professor John Blaxland, of ANU's Defence Studies Centre, said Darwin would "likely see considerable additional attention in the coming weeks and years".

He said with the new administration "likely to continue to apply pressure on China" and come looking to Australia for additional help, it may be the Top End city that answers the call.

"Darwin's going to be more on the crosshairs than it has been for some time now," Professor Blaxland said.

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.

At remote ranges in northern Australia this summer, US Marines and Australian troops trained to guide US bombers to targets on far-flung islands, illustrating the Corps’ increasing focus on a potential war in the Pacific.

In August, Marines flew RQ-21A Blackjack drones in Australia for the first time as part of the month-long Exercise Loobye.

During the exercise, US B-1 bombers from Guam and B-2s out of Diego Garcia flew as far as 4,000 miles to the Delamere, Bradshaw, and Mount Bundley training areas in northern Australia, simulating long-range precision strikes. The bombers were supported by tankers flying out of Okinawa.

RQ-21s flew over the ranges to gather information before and after the airstrikes.

“We’ve done an awful lot with the US Marine Corps,” Houston said. “They basically are the only nation that really gets a chance to routinely mount an exercise invasion of Australia, and that relationship … has served us incredibly well.”

THE ninth rotation of US Marines has wrapped up training in the Northern Territory, with 2500 troops expected to pack up and return home this month.

Colonel David Banning, Commanding Officer of Marine Rotational Force Darwin (MRF-D), said the troops were now preparing to return to their home stations after months of training alongside the Australian Defence Force in the Top End.

“We’re going to be rocking up again next spring, heading back down here for the 10th anniversary.”

It’s history now that the then-US president Barack Obama was shocked in 2015 to read that the Northern Territory’s Country Liberal Party government had awarded a Chinese company — with alleged links to the People’s Liberation Army — a 99-year lease over the Port of Darwin, in a $506m deal.

The ABC reported in June 2019, citing “multiple officials, speaking on the condition of anonymity”, that “secret planning” had begun for a new port facility just outside Darwin, which could eventually help US Marines operate more readily in the Indo-Pacific.

In July this year, a Northern Territory government report on developing Gunn Point, just west of Glyde Point, contained a tantalising reference to a possible port.

However, the report’s author — the NT Planning Commission — stated on its website that “there are no current plans for Defence infrastructure within the Gunn Point Peninsula”.

so I guess that means there may be Defence infrastructure within the Gunn Point Peninsula?