Sweden sends six Gripen jets to Poland for NATO’s Air Policing, marking its first forward deployment as a NATO member.

The U.S.’s call for Europeans to spend more on militaries prompts talk of changing the rules for what counts as military spending.

Real Lives in the Ruin of Empire, the journalist Howard Amos’ first book, is a prescient and fascinating examination of the borderlands of a bellicose nation. Focusing on the Pskov region, which juts ...