With real-life echoes of SAS Rogue Heroes – this is an astonishing account of Europe’s biggest major conflict, told through the eyes of ragbag collection of foreign fighters

Three days after Russian tanks roll into Ukraine, President Volodymr Zelensky issues a desperate appeal for foreign military volunteers to help defend his country. Thousands answer the call from all over the world: some of them experienced soldiers, others novices who’ve never held a gun before.

Among their ranks are high-minded idealists, adventure-seekers bored with civilian life, and ex-criminals seeking redemption – all risking their lives against the world's most vicious superpower. Some flee at the first sign of trouble, others become heroes; many are killed, and a few turn their guns on each other.

This is their story – often terrifying, often tragic, sometimes comic, and sometimes glorious…