Two Swedish Jas 39 Gripen fighter jets have completed their first close-range interception mission under NATO command, ...

The European Union has become increasingly concerned about Russian interference as part of what it sees as a broader hybrid ...

Tim Marshall analyses the limits of Vladimir Putin's global ambitions from an extract of Prisoners of Geography ...

Polish security agency to investigate disappearance of Belarus’s opposition activist amid fears of foreign involvement.

NATO Secretary-General Mark Rutte refused after speaking with President Donald Trump to weigh in on a U.S. plan to end Russia ...

James Marson leads Ukraine coverage for The Wall Street Journal.