Overwhelmed by enemy fire, Zulu Company have marshalled their casualties from the "killing ground" and staged a hurried withdrawal.

Last to leave, Company Sergeant Major Shep Shepherd describes desperate efforts to account for their missing man.

Senior Marine, Lance Corporal Mathew Ford cannot be found.

Back at base - the decision is instant. A "no-brainer".

"We're going back to get him."

A small, mobile group of volunteers is assembled for the "dirty dash" - a race back to the scene of the battle in the Viking vehicles. Captain Chris Witts gives an insight into the nature of decision-making under pressure.

But it's a plan that the enemy may see coming. An alternative option comes from a pilot high above them.

The Fort is told solely by current and former members of the Armed Forces.

Produced by Kev Core.