Russia bombarded Ukraine’s second-largest city with massive strikes in the early hours of Saturday, its mayor said, one night after Moscow carried out one of the war’s largest aerial assaults on Ukraine.

Drones will be as key to Taiwan’s national security as they have been for Ukraine, a Taiwanese legislator told Euronews Next. The embattled country’s war efforts have boosted morale on the Asian island as it ramps up its own defences against the potential threat of a future Chinese invasion.

On June 1, Ukraine targeted several Russian air bases using first-person view (FPV) drones, cheap aerial vehicles which are remotely operated by pilots using camera feeds. According to reports, Ukraine used machine-learning algorithms to guide the drones to the target area.

Technological advances have given threadbare militaries and rebel fighters the ability to strike stunning blows against far stronger forces.

PRYLUKY, Ukraine (AP) — At least five people, including a 1-year-old child, his mother and grandmother, were killed Thursday in a nighttime Russian drone attack on the northern Ukrainian city of Pryluky, officials said.

But halting progress, ever-more deadly drone attacks and unmoving negotiating positions seem to have taken their toll. On Thursday, Trump used a striking analogy to concede the warfare was nowhere near over, and that he did not, at that moment, feel it was best to intervene.

Assaults in Russia and Ukraine have shown major military powers that they are unprepared for evolving forms of warfare, and need to adapt.