The biggest change in recent months has come from Ukraine’s newly developed midrange drones, which have allowed Kyiv for the first time to strike behind the front line, hitting Russian ammunition depots, supply convoys, headquarters and large concentrations of troops, sources say.

Ukraine was able to strike targets more than 300 miles from the border despite dense Russian air defenses around Moscow, President Volodymyr Zelenskyy said.

Ukraine has launched one of its largest aerial assaults of the war, targeting economic and military infrastructure deep inside Russian territory.