[@Isotope] I would say. The UPC is made of of quite a few different groups, many willing to work alongside one another for the greater good, others not so much, but hid away such contempt(these people would accelerate the the collapse). The UPC was not quite as developed and urbanized as Cascadia and the NAU, many settlements being small towns and such, very few cities in sight, and their loss was a crippling blow for the Coalition. When the Grogar countered the UPC's encirclement strategy, what little that held the country together all came down crashing down.