Why were Italian city-states so economically prosperous? They produced a lot of gold.
They imported more goods than they exported.
They were important centers of trade with the East and the Byzantine Empire.
They had a greater diversity of people.

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation:

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during the pueblo revolt, father de mora hid most of the gold in the mine and covered the entrance. he tried to take some of the gold with him, but had to leave it behind in order to escape.