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

As some Republican lawmakers push for the US to leave NATO, questions arise about the alliance's role, history, and impact on ...

The “root causes” also refer to the Kremlin’s claims that Russia is threatened by NATO expansion after the Cold War. That ...

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 ...

The president has discussed possibly favoring members of the alliance that spend a set percentage of their GDP on defense, ...

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 ...

The collapse of the Soviet Union greatly reduced the West’s fear of another world war—a fear that had led Western leaders to tolerate Soviet spheres of influence in central and eastern Europe. Many ...

The Trump administration's warning last month that Europe must now take care of security in its own backyard raises troubling questions.