The Navy's Triton drone reached initial operating capability last fall and is now being forward-deployed.
The Seabee training reflects the U.S. military's intense focus on preparing for a potential Arctic fight.
Air defenders are one of the most deployed units with the lowest deploy-to-dwell ratios in the Army, senior leaders have said in recent years.
More than 6,500 troops will participate in the month-long exercise.
Pentagon officials fear such reforms could harm active duty retention.
The former president suggested he would not defend NATO countries if they are attacked by Russia in the future.
The U.S. has been unable to send any new weapons packages to Ukraine as aid legislation stalls in Congress.
By Tara Copp, AP
Dubbed "Steadfast Defender 24," the drill come as Russia’s war on Ukraine bogs down.
By The Associated Press
NATO policing of its airspace has ramped up since the Russian invasion of Ukraine almost two years ago.
The Pentagon isn't considering withdrawing the extra troops anytime soon.
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