General Christopher Donahue, commander of U.S. Army Europe and Africa, said allies could seize Kaliningrad "in a timeframe that is unheard of."

The Kremlin has been rocked by the news that a once staunch ally is considering an exit from a Russian-led military coalition. The Collective Security Treaty Organization (CSTO), often seen as Russia's answer to NATO,

A member nation of the North Atlantic Treaty Organization (NATO) has warned that the war between Russia and Ukraine is slowly making it's way closer to the borders of their nation.

Trump agrees to sell billions in US arms to NATO countries including Germany, Finland and Denmark and others for quick distribution to Ukraine, following his ultimatum to Putin on peace talks.

Retired U.S. Army Lt. Gen. Douglas Lute, who also served as an ambassador to NATO, discuss the latest on the war in Ukraine.

President Trump is hosting NATO Secretary General Mark Rutte at the White House on Monday as the U.S. agrees to sell new and more weapons to Europe and Ukraine.

NATO Secretary General Mark Rutte discusses President Donald Trump's decision to sell weapons to NATO for Ukraine in an interview on 'Special Report.'

World War Three fears as NATO chief warns of joint Xi and Putin attack - Mark Rutte suggested that Chinese leader Xi Jinping could attempt to seize Taiwan while urging Vladimir Putin to launch a paral

President Trump has turned a corner on the Russia-Ukraine war this week, announcing a deal to send weapons to Ukraine via NATO and giving Vladimir Putin an ultimatum to make peace. Charles Kupchan, senior fellow at the Council on Foreign Relations,

President Donald Trump has softened his stance on NATO. He once called the Western alliance "obsolete." Now, he says, it's the "opposite of that."