Lore: When they arrived they had around 1 hour to prepare. they set up sandbags and land mines around the area and waited. After waiting for a while, they saw the enemy forces approaching, the Alliance opened fire on to the forces and did some damage to the enemy strike forces. After 3 hours of fight they had won, but when they thought the fight was over they heard mechanical heavy footsteps. It was the mech they had to fight. (After more hours) they manage to beat it by destroying it's power supply and breaking off the head.
References: TF2 Scout and Tuefort
