This is my prediction on how well each province did
Black Marsh - Did really good since they swarmed the daedras and forced them to shut down their own gates.
Morrowind - Did alright, had one major redoran city destroyed but they put up a good fight and the Telvanni were closing gates.
Cryodill - Did ok, had a city destroyed but they had the aid of the CoC.
Hammerfell - I think they did good since they were able to fight the Thalmors to a standstill. The daedra invaders probably got lost in the dessert while being swarmed by dessert warriors/aiki or swallowed by quicksand.
Valenwood - Think they did good since they got the forest field advantage plus mass amount of wood elf archers should be able to gun down many many daedras.
Summerset Isle - Did alright at the beginning but after the Thalmors took over, they started to kick ass.
Skyrim - Think they did alright, The jarls forces and clans probably gave them a good beatdown.
Elsweyr - They probably did ok, their sneaky tactics should surprised the daedras, and they got the fury of the sands on their side.
High Rock - Should had done pretty well since they got a pretty decent strong military there.