Arthur is tasked with gathering men and securing the perimeter with 4,000 men and building a wall behind them to stop the reinforcements from arriving to help while they take out the remaining troops.
15,000 men defend the rear side while 30,000 men siege the small fort this makes Arthur angry as he's left with the other force protecting the rear.
The main force siege the fort and slowly pushing them and killing them but they fail so they retreat to the fort holding the line.
The 45,000 men that are in the middle are cut down to 34,900 they had heavy casualties and the 30,000 men from Astros force only lost 4,000 men.