 Complete the following phrase:  In mid-September 1862, in response to the offensive by Confederate Generals Earl Van Dorn and Sterling Price, a three company battalion of the Sharpshooters marched south with Major General Rosecrans army towards Iuka, Mississippi. This detachment participated in the September 19th battle. They then returned to Corinth, where the entire regiment fought on both days of the October 3rd-4th 