Some of America's closest European allies say they're already in a gray zone between peace and war with Russia.

An impasse over Russian oil and imminent US sanctions has put Serbia at loggerheads with its traditional ally in Moscow.

Ukraine's drone attack on Russian bomber bases has underscored the urgency of fortifying U.S. military airfields.

Russia on Tuesday offered to discuss with the United States allegations from Washington that it had carried out secret ...

The U.S. Typhon missile system can conduct land-attack missions with 1,000-mile-range Tomahawk cruise missiles.

President Volodymyr Zelenskyy says he wants to order 25 Patriot air defense systems from the United States as Ukraine tries ...

Last month, the US sanctioned Russia’s two largest oil producers, prompting some buyers in Asia to say they’d scale back ...

The Iraqi government says it can no longer work with Russian oil company Lukoil – which has a huge stake in the country’s oil fields – because of recently imposed US sanctions against the company.

Russian officials say they are waiting for an explanation from President Donald Trump about nuclear testing. He hasn't given ...

Vladimir Putin ordered plans to restart Russia’s nuclear tests after Donald Trump said last week that America would carry out ...

President Trump said Wednesday he directed the Pentagon to immediately start testing U.S. nuclear weapons for the first time ...

Germany and the United Kingdom have warned of the growing threat posed by Russian and Chinese space satellites, which have been regularly spotted spying on satellites used by Western powers.