 Complete the following phrase:  The 3rd Missouri Infantry had been reduced to four companies during the process of consolidating with the 5th Missouri Infantry; these companies became Companies B, D, E, and H within the consolidated regiment. Colonel James McCown of the 5th Missouri Infantry commanded the new regiment, as Gause, commander of the 3rd Missouri Infantry, had been transferred to the Trans-Mississippi Department. The regiment fought in the Atlanta campaign in 1864, including at the 