Exclusive: Welsh Cavalry take on US Blackhorse Regiment in California's brutal Valley of Death

Soldiers from 1st The Queen's Dragoon Guards, also known as the Welsh Cavalry, have been pushed to their limit in a brutal game of cat and mouse with an elite US Army unit in California's unforgiving Valley of Death.

In a special report, Forces News joined the British troops as they were tested by the 11th Armored Cavalry Regiment - the "Blackhorse Regiment" - whose job is to wreak havoc on visiting forces and help turn them into better soldiers.

The gruelling training, named Exercise Diamondback, took place at the US Army's giant National Training Center at Fort Irwin.

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The Californian base in the Mojave Desert is one of three elite US Army training centres in the world and is America's largest, covering 1,200 square miles - eight times the size of Salisbury Plain - offering punishing terrain with danger around every corner.

Watch our exclusive report above to see what happened as the soldiers of the Welsh Cavalry went up against the Blackhorse Regiment on Exercise Diamondback, billed as the Super Bowl of military training.