MRF-D Commanding Officer Colonel Brendan Sullivan said the three-week training program was an incredibly important part of humanitarian aid preparation.

He said Exercise Crocodile Response was one of up to eight named exercises the contingent would practise during its deployment.

“The reality is the most likely mission we’ll confront – if history is any indicator – is disaster relief,” Colonel Sullivan said.

“We’re excited to have the opportunity to do it alongside our ADF partners, and to start with a humanitarian assistance and disaster relief exercise, I think sends a strong message that it’s something very, very important to us.”

The exercise is one of many that troops from the US, Indonesia, and Australia will take part in as part of humanitarian aid and disaster relief training for Exercise Crocodile Response 2023.

Darwin resident Sue lives on the fringe of a PFAS contamination zone and is one of the 30,000 Australians involved in a class action against the Defence Department.

"Residents have been trapped on contaminated land for years," Shine Lawyers' head of class actions Craig Allsopp said.

"They are unable to sell their properties or enjoy simple freedoms like running the tap for a glass of water or to bathe their children.

"Toxicology reports point to PFAS levels in the eight areas of investigation being dangerously high. It's time the government showed some accountability."

"It shouldn't be denial. It should be taking ownership of it, dealing with it and rectifying, and paying people out that need the money for medical bills and their properties."

An ex-US Marine bomb technician set alight in a barbecue explosion is claiming officials knew about a gas leak which led to the incident.

The 25-year-old has claimed in court documents seen by the ABC that he received 30 per cent burns to his body after attempting to light a barbecue which officials knew had a gas leak.

The documents say that around 11pm on August 1, 2019, Mr Williamson had tried to light the barbecue "to cook some hot dogs and burgers", unaware there was a pre-existing leak.

Barrister for the US government, Dr Christopher Ward SC, argued that the US should "retain foreign sovereign immunity" in the case, as it did not involve any harm or incident to an Australian citizen.

Thousands of US Marines have arrived on our shores for a mission that is also bolstering the amphibious warfighting capability of the Australian Army.

The Marines – who arrived in the Northern Territory for their 12th annual rotation in March – specialise in amphibious operations and are also in the middle of a major transformation to match China’s armed forces.

Colonel Brendan Sullivan, the commanding officer of this year’s Marine rotational force, said this year’s training exercises in Australia and the surrounding region offered “incredible opportunities”.

Asked if they were seeking to replicate potential conflict scenarios in the South China Sea, the Pacific Islands or the Taiwan Strait, Colonel Sullivan said that was something “we’re grappling with right now” as the Marines sought to project force across a greater range.

“We’re going through a force design process where we’re trying to achieve the force that we think we’re going to need to have in the years ahead … and trying to get after some of the challenges that we think are associated in those operating environments,” he said.

“We’re trying to posture so that we can be ready to operate in that type of environment in the near future.”

This year’s Marine exercises include Predator’s Run in the Northern Territory and Melville Island, north of Darwin.

Ten Marine Corps MV-22B Ospreys have arrived in Australia’s Northern Territory as part of a 2,500-strong rotational force, the Marine Corps said Tuesday.

The Ospreys, from Marine Corps Base Hawaii’s Marine Medium Tiltrotor Squadron 363, are deployed to Royal Australian Air Force Base Darwin, according to a Marine Corps statement and information released Friday by the U.S. Department of Defense with photographs of the aircraft.

The tiltrotors, air crew and support personnel make up the air combat element of Marine Rotational Force — Darwin, which began its annual seven-month rotation last month.

The 12th contingent of the rotational force since 2012 will practice expeditionary operations, geographically distributed communications, non-combatant evacuation, embassy reinforcement, humanitarian assistance/disaster relief and rapid projection of combat power