Ellie Cook is a Newsweek security and defense reporter based in London, U.K. Her work focuses largely on the Russia-Ukraine war, the U.S. military, weapons systems and emerging technology.

Russia has claimed to have captured another key Ukrainian town as it looks to consolidate gains ahead of potential peace talks pushed by Donald Trump. After months of heavy fighting, Russian ...

Russian troops advanced near eight settlements in Ukraine’s Donetsk region between Saturday and Sunday, according to the open-source Ukrainian battlefield map, Deep State. According to Deep State’s ...