 Complete the following phrase:  Pro-Confederate Governor Claiborne Fox Jackson appointed him to command the newly reformed Missouri State Guard in May 1861, and Price led his recruits who nicknamed him Old Pap in a campaign to expel Lyons troops. By then Lyon had seized the state capital and pushed through a bill to remove Governor Jackson from office and replace him with an unelected Union governor. The climax of the conflict was the Battle of Wilsons Creek, fought on August 10, where Prices Missouri State Guard, supported by Confederate troops led by Brigadier General Benjamin McCulloch, soundly defeated Lyons Army of the West; the Union general was killed during the battle. Prices troops launched an offensive into northern Missouri, defeating the Federal forces of Colonel James Mulligan at the 