Russian forces that invaded Ukraine just over a year ago have been bearing down on Bakhmut for months, putting Kyiv’s troops on the defensive but unable to deliver a knockout blow. “I think the tenacious defense of Bakhmut achieved a great deal, expending Russian manpower and ammunition,” Kofman tweeted late Sunday. Demolishing the bridges could be part of efforts to slow down the Russian offensive if Ukrainian forces start pulling back from the city. The Bakhmut battle has also served to expose Russian military shortcomings and bitter divisions. Russian Defense Minister Sergei Shoigu traveled to Mariupol and toured some of the city’s rebuilt infrastructure, the Defense Ministry reported Monday.