Sitting Bull lead the Lakota Sioux in defeating Custer
The "Great Society" was the name given to the reforms in health care.
The answer is Reforms in Health Care.
Feudalism is the dominant social system in medieval Europe, in which the nobility held lands from the Crown in exchange for military service, and vassals were in turn tenants of the nobles, while the peasants were obliged to live on their lord's land and give him homage, labor, and a share of the produce, notionally in exchange for military protection.<span />