What is the plot of the movie australia?

Explanation:With the globe on the brink of World War II, Lady Sarah Ashley (Nicole Kidman) travels from Britain to Australia to inspect a cattle ranch she inherited. Reluctantly joining forces with a rugged local known as the Drover (Hugh Jackman), she sets out on a cattle drive across hundreds of miles of harsh terrain to save her ranch. But when they finally reach the town of Darwin, they must contend with the same Japanese bombers that just rained death upon Pearl Harbor.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

i would think it's industries and hydroelectric power