The 26th Cobra Gold multinational military exercise is under way in Thailand.

The 10-day U.S.-sponsored training this year is joined by forces from Thailand, Japan, Indonesia and Singapore. An opening ceremony was held two weeks ago.

Featured activities include a U.N. peacekeeping computer-simulated staff exercise, field training exercises throughout Thailand and several humanitarian projects, according to a news release Friday from the Navy’s 7th Fleet public affairs office.

Field training will pair U.S. and Thai servicemembers, while all five participating countries will work together in the other elements of Cobra Gold, the release said.

Observers of different phases of the exercise come from Australia, Brunei, South Korea, Canada, United Kingdom, India, Bangladesh, Malaysia, Sri Lanka and Mongolia.

“We look forward to working with the Thais and those from Singapore, Indonesia and Japan,” Rear Adm. Carol M. Pottenger, Expeditionary Strike Group 7 commander and the Combined Naval Forces deputy commander of the exercise, said in the release. “Because if a contingency were to occur, it would take the cooperation and combined effort of all of us.”

The staff exercise will use a potential U.N. scenario in which two neighboring countries deploy military force in relation to a disputed country. Exercise participants are to work together to get the fictional nations to draw down their forces and allow for the insertion of U.N. peacekeepers.

Naval field training will involve mine countermeasures, security and force protection, explosive ordnance disposal and diving.

Involved assets include the Sasebo, Japan-based USS Guardian and embarked Explosive Ordnance Disposal Mobile Unit Detachment 51, and Guam-based units Mobile Mine Assembly Unit 10, EODMU 5 dive personnel and Mobile Security Squadron 7.

Also contributing to the exercise will be about 50 members of Expeditionary Strike Group 7’s reserve detachment 218 in St. Louis.

ESG 7 is headquartered at White Beach Naval Facility on Okinawa, with an operating detachment at Sasebo Naval Base.

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