Answer: Roman Confederation
Explanation:
10 amendments, these ten are also known as the bill of rights, and they were the federalists concession to the anti-federalists so that they would accept and ratify the constitution as a whole.
Plains Indians, including Sioux, Cheyenne, Crow, Black feet, Comanche, Pawnee, and many more, developed teepees made of buffalo hides and held up by wooden poles.
President who resigned during the fall of saigon was President Nixon