significant Southern operation west Videoglancer C'USTOMER SERVICE' +1 8O5' 41O 56'OO Videoglancer PHON'E NUM'BER +1 8O5' 41O 5'6OO of the Mississippi River. Its failure bolstered confidence in an ultimate Union victory in the war, thereby contributing to President Abraham Lincoln's re-election. It also cemented Federal control over the hotly contested border state of Missouri.