The developments followed Russian ground advances in recent days in Ukraine's border Sumy region, and both sides unleashing punishing aerial attacks on the other.

Aiming to create a "buffer zone," Russian forces have seized villages near Sumy, Ukraine’s northern regional capital. As 50,000 Russian troops accumulate on Ukraine’s border, the Sumy region prepares for a renewed large-scale offensive. More than 200 settlements are under evacuation orders after Russia advanced deeper into Ukrainian territory.

Artificial intelligence means machines can operate even when communications are blocked, but there are ethical concerns

American weapons are important, but Ukrainian drones have changed everything.

The challenge is that Russia has China’s industrial backing, allowing it to scale more effectively than Ukraine. China produces 80 percent of the world’s fiber-optic supply. Russia has far more state finances to allow the purchasing of these supplies, while Ukraine still heavily relies on volunteers to drive some of these efforts .

Russia dramatically intensified missile and drone attacks across Ukraine this month in an effort to sap Ukrainians’ morale – but it is also stepping up ground attacks in many areas along the long frontline,

German Chancellor Friedrich Merz has pledged to help Ukraine develop its own long-range missile systems that would be free of any Western-imposed limitations on their range and targets.

As the bloody battle against Vladimir Putin’s troops stretches into its fourth year, the toll on Ukraine is mounting. Hundreds of billions of pounds have been spent on fighting the Russian invaders, and at least 46,000 soldiers have died.

The advance may be linked to Moscow's attempts to create "buffer zones" along the border, Ukrainian regional authorities say.

Ukraine and Germany have signed a new military agreement that will see the two countries cooperate in the development and production of long-range weapons capable of striking targets inside Russia. The deal comes as Ukrainian President Volodymyr Zelenskyy warned that Russia is massing around 50,