Touting new weapons tests, Moscow signals to Washington that it must contend with the Kremlin’s power and negotiate.

From the trenches of World War I to the AI-driven battlefields of today, every era of warfare has been defined by innovation. Some weapons reshaped tactics — others rewrote history. […]

Iran theatre, Nato’s eastern front and the Korean peninsula all have different risk factors but ‘common thread is miscalculation under pressure’, says security expert

In September 1943, the Italian battleship Roma was steaming toward Malta to surrender to the Allies when a pair of German Dornier Do 217 bombers appeared overhead. The planes released two Fritz X glide bombs—each fitted with radio control and fins that ...

The two leaders reached an agreement on fentanyl, some tariffs and rare earths, at least for a year. But even as the global trade picture cleared a little, Mr. Trump spurred new worries about nuclear proliferation.