The great migration happened between 1916-1970 and was when 6 million African American were moved out of the Southern United States and to the urban Northwest, Midwest, and west
I believe the answer is: The world depended on Kuwait for oil.
At that time, Kuwait exported more than $ 100 Billion worth of oil to countries all over the world. The Coalition believe that If Iraq managed to get their hand of Kuwait's resource, the rest of the world would be in oil shortage. So they decided to intervene.
In August 1805 Lewis and Clark were looking for the Shoshone Indians. The Corps (Lewis and Clark's expedition party) needed horses to cross the Rockies and the Shoshone had them. Sacagawea, a member of the Corps, was Shoshone, but she had been kidnapped by another tribe many years before.
The Corps were still recovering from their portage around the Great Falls of Missouri. Morale was low. Lewis and three men were scouting ahead when they finally met a band of Shoshone. They were the first white men the Shoshone had ever seen.
hope this helps in anyway! :)
The North<span> Atlantic garbage patch</span>