Dragon Valley Cavalry Tour: What do you need to upgrade the War Hall?

According to the rules of the cavalry game, the requirements for upgrading the war hall by the Dragon Valley cavalry mobile game are as follows:

1. resources: upgrading the war hall requires a certain amount of resources, including wood, stone, iron ore and grain. These resources can be obtained by building and upgrading resource buildings, production and trade.

2. Level requirements: upgrading the War Hall usually needs to meet certain player level requirements. Players need to improve their level by completing tasks, participating in battles and accumulating experience.

Dragon Valley Raiders is a strategy game software.