As Washington seeks to resolve the war in Ukraine with peace negotiations, these maps show what each side in the conflict are ...

Ukraine’s government wants to restore the country’s frontier to where it was before Russia launched its first invasion more than a decade ago. The U.S. defense secretary said that was “unrealistic.” ...

Kyrgyzstan and Tajikistan are closing in on the conclusion of their long-running border dispute. What does the prospect mean ...

The 60-mile border that separates Lithuania and Poland has become NATO's biggest nightmare, and a potential Russian lifeline.