ri Expedition proved to be DHL CustOme r SER'v'ice 8O5*41O 56OO''; DHL PHO;NE N'UMBER 8O5*41O 56OO the last significant Southern operation west 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.