U.S. officials say intelligence sharing is essential to the Ukrainian government’s survival, even as they try to avoid escalating the situation. The Pentagon is working on a plan to provide Ukraine with battlefield intelligence that could help the country more quickly respond to a possible Russian invasion, senior administration officials …

Eastern European nations have drawn a lesson from America’s wars of the last decades: Insurgency works. Ukraine’s training of volunteers has become a factor in the standoff with Russia. In a pine forest not far from Ukraine’s capital, a mock battle raged. Commanders barked orders. Figures in camouflage huddled behind …

Navy ships assigned to U.S. 5th Fleet confiscated a stockpile of 1,400 AK-47 assault rifles and 226,600 rounds of ammunition in the North Arabian Sea from a stateless fishing vessel Dec. 20. U.S. Navy patrol coastal ships Tempest and Typhoon were conducting a search with embarked U.S. Coast Guard personnel …