An unidentified airman has been arrested in connection with an attack using explosives in April on a small U.S. military base in Syria that wounded four American service members, Air Force officials said Tuesday. “As part of an ongoing investigation, on June 16, an airman was taken into custody stateside …

Kremlin threats of retaliation against NATO ally Lithuania for instituting a transit ban over the weekend that affects Russia’s exclave of Kaliningrad could have serious implications for several hundred U.S. soldiers positioned in nearby northeastern Poland. For years, security analysts have feared that in the event of a crisis with …

Overestimated and overconfident, Russia’s armed forces floundered in the face of fierce resistance after invading Ukraine on Feb. 24. They retreated from Kyiv and other cities they had expected to take within a few days. Some of Ukraine’s supporters then made the opposite error of triumphalism — or so it …