Rebel army warehouses become available during cross-server border war event.

Here is some info about the Rebel army warehouses:
-There is a countdown for opening the Rebel army warehouses once the border war begins. when the countdown ends, commanders can attack the warehouses to collect resources after defeating the rebels.
-When all the resources inside have been looted, a protective shield is activated. The warehouse will reopen after a set cooldown period.
-Rebel army warehouses will be opened alternatively in either side's servers until the war ends.
-When a rebel warehouse opens, a set number of level 9 resource zones will spawn in the area.
-Level 9 resource zones contain many resources that can be collected much faster than normal resource zones.