Might Be This One:
The Iroquois Confederacy were six tribes who lived, fought, ate, built, and worked together to better their lives. They created laws and government. Some of their ideas worked so well they helped our country create its first democratic government and constitution.
Most likely this one:
The Peacemaker established clans within the nations of the Iroquois Confederacy. The clan system united the nations and ensured peace among them. They are still an important part of the identity of Iroquois people today. They were an influence on the Founders of America.
The "Holy Experiment" was an attempt by the Religious Society of Friends, also known as Quakers, to establish a community for themselves and other persecuted religious minorities in what would become the modern state of Pennsylvania.
Social revolution occurred in America during the the 1970's. The political and economical status of women increased. Discrimination were removed in minority groups. Environmental awareness also started during this time having the first Earth Day celebrated in 1970.
The Korean War or conflict can be compared to the Vietnam War. The basic reason behind the United States taking a active role in these wars was to stop independent nations falling under communist control.