If you mean polio then <span>it dropped by 6000 in 1962 or the first year when the vaccine was released</span>
The answer to this question is 10,000 indians.
They gathered in that place because of the Treaty of Fort Laramie.
The treaty of Fort Laramie divide the lands that exist on top of united states into several parts, and determine which part of region that couldn't be claimed in any way by the Government
DONT CLICK THE THING ABOVE, REPORT IT
What are the options given?