"We're not expected to win every mission" says Sgt. Haydn Poyner.
"They throw different scenarios to see what assets are best used and what different situations, so sometimes you might get absolutely hammered and have mass casualties whereas sometimes we'll do extremely well and win the battle."
The project - known as 'Future Force - is based at the Army's Land Warfare Centre in Warminster.
"We're trying to determine exactly what we need to fight and win the wars of tomorrow" says Col. Tim Law, assistant head of army force development.