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Russian state news agencies say the country's navy claims to have driven away a submarine believed to be American that...

Russian troops backed up the separatists in eastern Ukraine in breakaway elections that NATO called illegitimate.

Thirteen months after Russia began its occupation of Crimea, the United States and its European allies must remain steadfast.

Russian ships and fighter jets made their presence known during the opening days of a 17-nation strong NATO exercise in the...

ISIS strongholds in Iraq and Syria are the focus of much scrutiny, but there are new concerns the terror network is looking...

The black box recorder of the Russian passenger plane that crashed on its way back from Egypt's Sinai resort of Sharm el...

Key GOP lawmakers plan to file legislation repealing a Defense bill provision allowing the Pentagon to buy an unlimited...

The downing of a Russian airliner in Egypt last year was blamed by the CIA on the ISIS affiliate in Sinai.

The U.S. had short notice that Russian bombers were coming from Iran to hit targets in Syria, a U.S. military spokesman said.

Putin pledged to strengthen Russia's role in Syria's civil war in response to the assassination of Russia's ambassador to...