Across eastern Ukraine, Russia’s tiny gains are adding up. It is capitalizing on a series of small advances and throwing significant resources into an emerging summer offensive, one that risks reshaping control over the front lines.

The attack, just hours after President Trump gave the Kremlin a new deadline to work toward ending the war, was part of a wave across the country, the authorities said.

Ukraine faced another night of Russian drone assaults as several cities and regions came under attack between Tuesday night and early Wednesday morning, causing injuries and damage to both residential and critical infrastructure.