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.

A coalition of Ukrainian hackers breached and wiped systems belonging to Gaskar Group, a Moscow-based drone maker.

Ukraine's newly appointed Prime Minister Yuliia Svyrydenko said on Thursday that her government would be launching a full audit of public finances to achieve "real savings", and that large-scale privatisations should be accelerated.

Ukraine’s prime minister announced his resignation Tuesday in the first formal step of what is expected to be a significant reshuffle of President Volodymyr Zelenskyy’s government, which could also see the country’s ambassador to Washington replaced.

I have already signed documents to the Verkhovna Rada of Ukraine regarding Denys Shmyhal as the new defense minister," President Volodymyr Zelensky said.