The chief of Russia's general staff told President Vladimir Putin on Thursday that Russian forces had taken control of the northeastern Ukrainian city of Kupiansk, but Ukraine's military denied the city had changed hands.

Heavy air strikes: Ukraine struck Russian territory with tactical ballistic missiles supplied by the United States. Moscow hit Myrnohrad with FAB-3000 glide bombs. Moscow-Pyongyang cooperation: The Russian Ministry of Defense released a video of North Korean sappers clearing mines in the Russian region of Kursk.

Senior Pentagon officials have arrived in Ukraine to "discuss efforts to end the war" with Russia, the US military says. US Army Secretary Dan Driscoll held talks with Ukrainian P

The U.S. Coast Guard carried out a "safe and professional overflight" near the Vishnya-class intelligence ship late last month.

North Korean state media say senior North Korean and Russian military officials discussed strengthening cooperation in their latest talks in Pyongyang, as the two countries continue to align over Russia’s war in Ukraine.

While the U.S. has taken part in previous iterations of the military exercise, this year's U.S. footprint was smaller as allied nations are pressed by the Trump administration to put more into European defense.