Smallpox, whooping cough strike the Great Plains (10 jul 1836 año – 7 mar 1840 año)
Descripción:
 A smallpox epidemic spreads through Native communities in the West, killing 10,000 people in the Northern Plains alone. Whooping cough kills many young children and toddlers. 
Añadido al timeline:
fecha:
10 jul 1836 año
7 mar 1840 año
 ~ 3 years and 7 months