Ukraine

The prospect of a nuclear exchange between Russia and the U.S. seemed, until recently, to have ended with the Cold War.

The Russian warning leans on language that echoes America’s own history of legally questionable imprisonment from the War on...

Poland's Ministry of Foreign Affairs announced that the country plans to deliver all of its Soviet-era fighter jets to a U.S...

"Russian combined-arms doctrine has generally advised against making cities primary objectives."

U.S. analysts believe as many as 4,000 Russian troops may have been killed in the 13 days since Russia invaded Ukraine.

"The performance of Ukraine's military has been surprisingly strong against the larger and better equipped Russian military."

The former Coast Guard cutter Cushing, commissioned by the Ukrainian Navy as the Sloviansk, was destroyed during an airstrike...

The Pentagon has deployed some 12,000 troops to NATO member nations within spitting distance of Ukraine.

The command, based in Germany under Air Force Gen. Tod Wolters, is coordinating shipments to the war zone from 14 countries.