The link below shows a rather over-looked part of American history; while the nation was engaged in a great civil war (echoing Lincoln there), the Eastern Sioux tribe fought an offensive against the US in 1862. (2012 marks the 150th anniversary). The war began after a series of broken treaties with the government, and an enormous influx of white migrants continued to threaten the Sioux way of life. Hundreds were taken prisoner, and were taken to internment camps in Minnesota. Lack of food and warm clothing in these camps led to the deaths of hundreds of women and children. Lincoln oversaw the execution of 38 Sioux leaders, reducing the number from 300. This remains the largest mass execution in American history.