As the Ukraine war enters its third year, the infantry of 59th Brigade are confronting a bleak reality: they're running out of soldiers and ammunition to resist their Russian invaders.

One platoon commander who goes by his call sign "Tygr" estimated that just 60% to 70% of the several thousand men in the brigade at the start of the conflict were still serving. The rest had been killed, wounded or signed off for reasons such as old age or illness.

Heavy casualties at the hands of Russian forces have been compounded by dreadful conditions on the eastern front, with frozen soil turning into thick mud in unseasonably warm temperatures, playing havoc with soldiers' health.