 Complete the following phrase:  Minus its leader, von Gilsas regiment served in the brigade of Julius Stahel under Maj. Gen. Franz Sigel in the Second Battle of Bull Run. When Sigels command became XI Corps, Army of the Potomac in late 1862, the De Kalbs were in First Brigade of Stahels First Division. Von Gilsa, after recuperating, became brigade commander in this period. Following the 