I am playing Tsu campaign. Fought plenty of battles. race north south west and east all the time and my financial was lost and reclaimed several times. Until 1870 my Tsu has no more than 10 provinces. Nagaoka, Sado, Obama invaded me several times, I just barely fend them off and repeatedly request for peace several times. It seem to be pay off. Enjoy a bit of peace for short time while concentrate on developing economy. Then my economy give me a huge profit so I decide to prepare an invasion against Nagaoka (by now Nagaoka is the only Shogunate major power on Honshu, most other Shogunate powers have been reduced from mighty to moderate or feeble). So I built up 3 full divisions to invade. Before my invasion, my prestige grow from strong to terrific. Nagaoka noticed, it move 5 full divisions to my borders but I dont care, I invade anyway. While I am busy facing Nagaoka in the east, Tosa switched sides to Shogunate and declared war on me in the west. Not only that, the now Shogunate-Tosa clans supported by its 3 Imperial clans(Matsue, Saga and Satsuma) in a war against me.
Seriously, a Shogunate clans got supported by 3 IMPERIAL CLANS? @[email protected]
I dont really understand why Tosa switch to Shogunate even though by now Imperial forces control most of Japan.