Good Friday was signed 1990 I'm not aware of the others.
The answer is: : The song used was called the <span>Yankee Doodle. Hope this helps! Good Luck! :)</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