This ISW map shows the state of play in Belgorod, Russia, where Ukraine is said to have made gains. This ISW map shows the state of play in Belgorod, Russia, where Ukraine is said to have made gains.

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.