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

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

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,

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.

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."

Armenia has signalled it could quit the Collective Security Treaty Organization (CSTO), a security bloc seen as Moscow's version of NATO, after a peace treaty with Azerbaijan

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.

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

Despite Russian President Vladimir Putin's "pathological fixation" on preventing Ukraine from joining NATO, a direct Russian attack on the alliance is highly unlikely. -The war in Ukraine has exposed the Russian military's significant weaknesses and its limited ability to project power,

President Donald Trump has long worked to bring peace to Ukraine, but his recent major policy adjustments in response to