This chapter shows again how dumb Oden was and how dumb he acts. He should know that Orochi and Kaido set up all to slave all wano for weapons. He should know that Kaido never plan to release wano free. People dying was given even without the war. Early or later a war would happen. Oden act here like a total idiot. At worst he should team up with Hyo and the all other Daimyo, start a fight with Kaido. Hyo and Oden in team could fight Kaido at the result could end different. Scabbards and Daimyo+army could handle King and Queen+beast pirates.
I mean the outcome would be total different. But even then, forget Hyo and the Wano Samurai. He just need to team up with Rayleigh and the Roger pirates. Gabban would handle alone King and Queen(beat them), Roger pirates would team up with Scabbards and beat down remain beast pirates.
Rayleigh and Oden would beat Kaido.
Overall all what happen to Wano is only Oden fault. He was to proud to let someone else help him, in the end it cost his wife life and many other people lifes. Usually when a country goes down to a villian, they been always helpless, until Luffy save them(Alabasta,Skypia and Dressrosa) but Wano was the total opposite they(Oden) had the chance in their hands.