 Complete the following phrase:  In the fall of 1863 the Confederate railroads, acting as interior lines of communication, transferred two divisions and an artillery battalion of Lieutet General James Longstreets I Corps, Army of Northern Virginia, by railroad from Virginia to Georgia to reinforce General Braxton Braggs Army of Tennessee. The troops began arriving at the Catoosa Platform, Georgia on September 19, having begun their journey from Virginia on September 9. Ultimately, only 5 of Longstreets 10 infantry brigades arrived in time to participate in the Confederate victory at 