The Indiana Rangers, also known as the Indiana Territorial Mounted Rangers, were a mounted militia formed in 1807 and operated in the early part of the 19th century to defend settlers in Indiana Territory from attacks by Native Americans. The rangers were present at the Battle of Tippecanoe, and served as auxiliaries to the army during the War of 1812. At the peak of their activities they numbered over 400 men.

The Vincennes Trace was a major trackway running through what are now the American states of Kentucky, Indiana, and Illinois. Originally formed by millions of migrating bison, the Trace crossed the Ohio River near the Falls of the Ohio and continued northwest to the Wabash River, near present-day Vincennes, before it crossed to what became known as Illinois. This buffalo migration route, often 12 to 20 feet wide in places, was well known and used by American Indians. Later European traders and American settlers learned of it, and many used it as an early land route to travel west into Indiana and Illinois. It is considered the most important of the traces to the Illinois country.