After Ferdinand and his subordinates finished killing the walker, they now and then entered back to the form where they came from. Which they then started marching towards the resource location that they found earlier. Seconds turned into minutes and minutes turned into hours. A few hours had already passed, and they had already arrived at the resource location. They then unpack their equipment and started mining the raw materials that they require in making ammunition.
For the meantime, they will stay with the wooden operating base and defenses. They would need to wait until they have a large surplus of raw materials to upgrade their base. They would also need the resources that they are currently gathering, not just for the ammunition, but also to build the maintenance equipment for their Mark 1 Bolt-Action Rifle and for their operating base.