North Atlantic Treaty Organization - NATO

Ukrainian troops began moving against separatists in eastern Ukraine as NATO considered shoring up defenses in Europe.

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

A suicide bombing near Bagram Airfield in Afghanistan killed six U.S. troops and wounded two other Americans and an...

Retired Adm. James Stavridis is being vetted by Clinton while retired Army Lt. Gen. Michael Flynn is a contender with Trump.

Sen. Tom Cotton, a possible choice for Secretary of Defense, plugged for a strong NATO while criticizing Russian expansionism...

Russian pilots intercepted NATO aircraft last month even as officials say provocations from Moscow are winding down.

NATO has to get better at communicating and intelligence sharing, according to the outgoing commander of U.S. Army Europe.

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

NATO's commander warned of the threat posed by ISIS “lone wolf” terrorists returning to Europe and the U.S.

NATO's first Alliance Ground Surveillance aircraft arrived at Edwards Air Force Base Dec. 19, completing its first flight.