Eventually the Don was shot and War began. He survived, but sonny was killed, he was killed on the expressway where the booth was.
After the Don recovered, he held a meeting with all of the Dons, in and out of state. He said how the fighting must stop and eventually everyone agreed. Although he attained peace he showed weakness for not seeking vengeance for sonny's death
Later the Don died and Michael took his place. He got his revenge by killing the Dons of the Brazzi and the Tattaglia family. He also had Tessio and Carlo for betraying the family.