Despite the changes in warfare, Russian forces retain the ascendancy and are making slow but steady advances in the east and north of Ukraine. Russia has also caught up in UAV technology after falling behind early in the war, according to military analysts, and like its enemy is churning out drones domestically at a rate of millions a year.

Zelenskyy has emphasized the importance of expanding production to counter Russia's invasion and strike deeper into Russian territory.

A Russian official says American Daniel Martindale has been rewarded with citizenship for spying on Ukraine, "by decree of our President Vladimir Putin."

Daniel Martindale helped the Kremlin target Ukrainian troops and was then spirited out of eastern Ukraine by Russian special forces.

Two Russian agents were killed by Ukrainian security forces Sunday following reports that the Russian operatives assassinated Ukrainian Colonel Ivan Voronych.

Ukrainian Security Service says two Russian FSB agents suspected of killing Colonel Ivan Voronych on July 10 have been "neutralized" in Kyiv Oblast.

Ukraine's security agency says it has killed Russian agents suspected of assassinating a senior officer in Kyiv.

Ukraine’s military commander in charge of the country’s drone warfare program urged the US and NATO countries alike on Wednesday to learn from Kyiv’s use of the technology on the battlefield so in the future there are not “hard questions from your children [about] when [their] father will come back.