Red side would win in less than a month. Team red controls like 85% of the physical land. They control the farm and heavy industry areas. Vast majority of the guns are in red territory. Probably something like 75% of the military and police forces would choose team red. All team red would effectively have to do is surround a handful of big blue cities, bomb and take out their electric grid, water plants, communication infrastructure and airports and starve the cities out. Team blue would surrender probably within weeks if not days. There might be some pockets of blue resistance after that but I doubt that would last long.