@Dadarian
I just want to be sure, but Greater Zhili is just the province of Zhili and Anhui, not the whole of East Command (Blue Banner), right?
I have marked, whom from the East Command, there is military governor in which province, after my best knowledge.
This shows for example that any war between the Jehol Clique and the Greater Zhili Clique would have to go the province of Hebei, which is under the command of Zhang Xun.
So if the Jehol Clique wants to attack The Greater Zhili Clique they would either have to get permission from Zhang Xun to walk through his province or they would also have to declare war on him
@Dadarian Do tell me, if I am wrong about this or if it somehow is out of date.