Meet the US Army's most-feared armoured unit wreaking havoc on visiting forces

Forces News joined British troops as they were put to the test 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 in the Mojave Desert.

Soldiers from 1st The Queen's Dragoon Guards, also known as the Welsh Cavalry, were pushed to their limit in a brutal game of cat and mouse by their US opponents in California's unforgiving Valley of Death.

The Blackhorse Regiment is the resident OpFor - Opposing Force - that is tasked with training units that visit the massive Fort Irwin National Training Center.

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