"I want the American people to understand what has been, what is and what will be, to solve this problem," Okinawa Governor Denny Tamaki said.
A U.S. Marine Corps aircrew is under investigation after a second flight pattern outline of a penis was drawn on scanners in the past two years.
Around 50,000 troops, 65 vessels, 150 aircraft and 10,000 vehicles will take part in Trident Juncture 2018.
Curtis Krueger and his wife are being held on $1 million bail each, and Newsweek sources say the command climate at the U.S. Marine Corps base has become "completely toxic."
U.S. Central Command said a Marine colonel was "unable to conclusively determine if" the incident was intentional or accidental.
The survey also found that 35 percent of service members believe getting mental health treatment is damaging to their military careers.
U.S. air presence over the Black Sea angered Moscow.
The Amphibious Rapid Deployment Brigade held a ceremony as the threat from China is said to be growing.
Over 10,000 Chinese marines traveled across the country for battle exercises as they prepared for threats at home and abroad.
The heads of the Navy and Marine Corps are worried that China's global outreach was detrimental to U.S. interests, but Beijing might just be ahead.
People began to feel ill with symptoms of sore throats and nosebleeds after mail was opened containing an unknown substance at the U.S. Marine Corps headquarters
Nearly 7,000 U.S. troops are taking part in the 37th Cobra Gold drills held in Thailand.
Despite no deaths, dozens were still hospitalized.
"It will be a very, very kinetic, physical, violent fight over some really, really tough ground, and everybody is going to have to be mentally prepared," Marine Corps Commandant General Robert Neller said.
The Kremlin has vowed it will not be caught off guard if war breaks out.
The branch's top commander said he is also considering making promotions conditional on marines undergoing refresher training.
"Be at the top of your game," in case diplomacy with Kim Jong Un failed, was the U.S. defense secretary's Christmas message to soldiers.
Undersea lines across the Atlantic are crucial for communication and trillion-dollar trade, but Russian ships have reportedly been moving near known cable routes.
Russian marines are training in field combat in North Korea, bordering Primorye.
Two ships in Russia's Pacific Fleet practiced amphibious landing in Primorye, Russia, and more drills in the country's east will follow.
The fatal incident has fueled the local governor's campaign to reduce U.S. military presence in Okinawa, Japan.