As Ukraine Pushes Deeper Into Russia, Moscow Sends Reinforcements

Military analysts said the attack across the border had involved elements of at least four brigades in a rare example of successful maneuver operations involving support from artillery, air defenses and electronic warfare, resulting in quick advances on the ground.

“It seems to be a fairly well-coordinated and planned combined armed operation,” said Franz-Stefan Gady, a Vienna-based military analyst. “You have electronic warfare assets that were deployed to jam Russian command and control. You have air defenses that were moved in to create air defense bubbles around the Ukrainian advance. And then you have fairly effective mechanized formations moving forward at a fairly steady pace.”

Mr. Gady and other experts said the main question now is whether Ukraine can maintain the momentum and turn the success on Russian territory into useful gains. The Ukrainian Army has few reserves it can pour into the fight, and it continues to suffer from shortages of weapons and ammunition, analysts say.

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