After Liu Bei established himself in Yi Province in 215, the essential prerequisites of the plan had been completed. The geopolitical arrangement envisaged by Zhuge Liang proved, however, to be a militarily unstable one. The alliance with the state of Wu in the east broke down over the issue of the occupation of Jing Province. By 223, the province had been lost and Liu Bei, as well as some of his top generals, were dead. Even after Zhuge Liang re-established friendly relations with Wu, his original plan had been markedly altered since only the left prong could be executed.