 Complete the following phrase:  In an attempt to carry out his orders from both Davis and Gen. Joseph E. Johnston, Pemberton and his Army of Mississippi set out east to combine with Johnstons forces gathering around Jackson, while remaining in contact and covering Vicksburg. Another order from Johnston changing their proposed meeting location caused Pemberton to turn around, and when he did he accidentally collided with Grants army at the Battle of Champion Hill on May 16 and suffered a major defeat. Pemberton retreated to the 