<span>The Incas, who were founded in 1438, was the Empire to achieve this.</span>
People in a caravan are glad to see an oasis, because they usually traveled in deserts. There are limited amount of water located in a desert, and animals and humans cannot survive without water. Whenever they see a oasis, they are happy, because not only does it supply them with water, but it may also draw game (animals that could be eaten) to that area, which provides both water and food
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Trade was a fundamental aspect of the ancient Greek world and following territorial expansion, an increase in population movements, and innovations in transport, goods could be brought, sold, and exchanged in one part of the Mediterranean which had their origin in a completely different and far distant region. <span />
The average income was $1,368, and the average unemployment rate in the 1930s was 18.26 percent, up from the average of 5.2 percent in the 1920s.