Complex sentence: The battle is significant because despite suffering initial losses, Wu was able to turn it into a defensive stalemate before proceeding to win a decisive victory, which halted the Shu invasion and preceded the death of Liu Bei, Shu's founding emperor.
Split into simpler sentences: The battle is significant because Wu was able to turn the situation from a series of initial losses into a defensive stalemate, before proceeding to win a decisive victory over Shu. The Wu victory halted the Shu invasion and preceded the death of Liu Bei, Shu's founding emperor.