Ukraine

Tensions over Ukraine have led to suggestions the Obama administration take a tougher defensive posture toward Russia.

NATO’s commander announced a modest shift of troops, planes and ships to eastern Europe during the Ukraine crisis.

The U.S. should send a message to Russia by stopping troop reductions in Europe, the NATO commander said Tuesday.

One of the last U.S. combat units in Europe is asking for bigger guns amid rising tensions over Russia's involvement in...

Defense Secretary Jim Mattis on Thursday pledged continued aid to Ukraine as it clashes with pro-separatist, Russian-backed...

Hagel said there were no immediate plans to base U.S. troops in Eastern Europe in response to the Ukraine crisis.

President Obama on Friday ruled out a military response to the shoot down of a Malaysian airliner over eastern Ukraine.

Russian troops backed up the separatists in eastern Ukraine in breakaway elections that NATO called illegitimate.

Russia has taken advantage of the cease-fire to build up rebel forces in Ukraine and prepare for a possible new offensive...

It was an eventful year for the U.S. military -- the Military.com staff has selected what it believes are the top stories of...