Politicians and military leaders have warned that Russia could be ready for a full-scale war against NATO by 2029. Now, ...

Even for an administration with a knack for moving fast and breaking things, Elbridge Colby’s moves at the Pentagon have ...

Donald Trump privately urged Ukraine to strike targets deep inside Russia, including Moscow, if supplied with advanced US ...

Most NATO allies promised to ramp up defense spending and reaffirmed their "ironclad" commitment to mutual defense. But there are lingering concerns over the scale and scope of US engagement.

While Trump's new Russia policy announcement was welcomed by and large, there are still challenges ahead that will require ...

NATO Secretary-General Mark Rutte is set to meet President Donald Trump this week on the heels of the U.S. leader announcing ...

CHARLES KUPCHAN is Professor of International Affairs at Georgetown University and a Senior Fellow at the Council on Foreign Relations. His most recent book is Isolationism: A History of America’s ...

The American military has been the alliance’s bedrock. But shifting US priorities, including in the Middle East, are putting new pressure on European allies ...

Allies like Japan, South Korea, the Philippines and Australia have no choice but to try and meet the president’s conditions ...

Trump's unpredictability causes great anxiety in Europe, particularly his questioning of the mutual defense promise at the ...

If Beijing moves against Taiwan, NATO might soon find itself in a two-front war with China and Russia — or so the alliance's ...