Ukraine breached Russia's defensive line on Wednesday and was able to deploy vehicles past it. It was a major achievement, but analysts said Russia would respond with a harsh counterattack. It was a major dent in the so-called "Surovikin Line", but there are more layers of defense to go. AdvertisementAdvertisement"This is the first major crack in their defense … of course, the Russians should be worried," he said. An official cited by the state-run RIA Novosti agency said that Ukraine had tried to breach Russia's lines but was forced to retreat.

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Persons: Marina Miron, Franz, Stefan Gady, Gady, Michael Kofman, Kofman, — Johan Huovinen Organizations: Service, Ukrainian, Department of, King's College London, Street, Institute for International Strategic Studies, Carnegie Endowment, International Peace, Swedish Defense University, RIA Locations: Ukraine, Russia, Wall, Silicon, Verbove, Zaporizhzhia