It’s a new day in Europe. Gone are the halcyon years of unshakeable American commitment to Europe’s defense against Russia.

Expanding the nuclear-sharing program to Warsaw would send a clear message to Putin: any attack on Poland would be a ...

Confidence in America's role in safeguarding its allies in Europe is wavering, while Washington has launched into a trade war ...

President Donald Trump cast doubt Thursday on NATO’s commitment to defend the U.S. if attacked, despite the alliance’s ...

A peace agreement along these lines would not mean Ukrainian “surrender.” By far the greater part of Ukraine would remain ...

The U.S. was one of 12 nations that formed NATO following World War II to counter the threat posed by the Soviet Union to ...

NATO has a history of transforming itself to fit the geopolitical moment. Western leaders questioned the alliance’s relevance after the Cold War. So NATO took on new missions by establishing no ...

Ukraine has made membership in NATO a key strategic aim ... U.S. protection against the Soviet Union, which during the Cold War was cementing its domination over Central and Eastern Europe ...