Trump is now offering assurances that U.S. troops won’t be sent to help defend Ukraine against Russia after seeming to leave open the possibility Monday.
A Russian court has repeatedly extended Paul Whelan's detention in a cramped Moscow prison while he awaits trial on charges that carry a sentence of up to 20 years.
The top U.S. general for NATO said Friday that he expects increased violence in Afghanistan in the lead-up to the election later this month, adding that allies will make necessary adjustments to military operations there to protect the vote.
In the world's hot spots from Iran to North Korea — and even among allies — some see opportunity in President Donald Trump's firing of his national security adviser, John Bolton.
The White House has relinquished its hold on $250 million in military aid to Ukraine after weeks of bipartisan pressure from lawmakers who said the funding was needed to deter Russia.
The U.S. should step up its distribution of intelligence with all NATO members to weaken Russian influence attempts and to help unify the alliance, in the event Russia targeted an attack against a NATO ally, a new report says.
U.S. Defense Secretary Mark Esper cautioned European allies against cozying up to China, arguing on Friday that Beijing seeks greater global influence by leveraging economic power and stealing technology.
Is it a conspiracy theory? The head of the U.S. Air Force in the Pacific has suggested that a recent Russian-Chinese air patrol may be an attempt to divide regional partners. The event resulted in warning shots fired by intercepting South Korean jets.