The foundation of Wu's kingdom was established pretty early by Sun Ce before 200 A.D. and the Sun family had a pretty good relations with the powerful families and officials in Jiang Dong who lent their support to the Sun family.
The foundation of Shu could be considered to be properly laid only after the battle of Chi Bi when Liu Bei gained some firm footholds at Jing Zhou. Subsequently, he expanded into Yi Zhou and took Cheng Du as the capital.
At which point in history was Shu stronger than Wu? Or is Shu the weakest among the 3 kingdoms from beginning till the end??