>there is no any guarantee his successor won't want to continue the war. If they continue the war, it will be difficult for them to hold onto power for more th

>there is no any guarantee his successor won't want to continue the war. If they continue the war, it will be difficult for them to hold onto power for more than 1 failed offensive. There will always be a group of people that want the war over, not for peace reasons necessarily, but for economic(and political or personal reasons). A new dictator stands on a shaky ladder. They need to have a successful offensive quickly or they will be replaced.