There are several states that flourished as a result of trade between the Sahel across the Sarah with north African crab traders and the Levant world. these city states included Timbuktu that had the earliest form of university in the world , GAO,<span>Djene. The city states often levied trade and were located along the trade routes.</span>
Answer: The valleys of the Tigris and Euphrates rivers were the site of the world's first civilizations. The rivers of Southwest Asia supported the growth of civilizations. New farming techniques led to the growth of cities.
Because it weakened the Japanese morale. The IJN would no longer be capable of operations in the Pacific Southwest because their resources were low. They were also still reeling from the losses at Midway.
The Americans secured Henderson field, a major airfield that prevented the Japanese from spreading south into Australia. The Aussies would be helpful in Operation D-Day.
US-Australian supply lines were no longer under threat. It's why the IJN tried to take the island in the first place.