Ia tusia se faaauauina o lenei palakalafa - Ina ua uma ona faamautuina Misuri i le tautoulu ma le taumalulu, na tuu atu le 18th Indiana i le ʻautau a Grant e taumafai e sopoʻia le Vaitafe o le Misisipi ma faoa Vicksburg. Na tau le 18th Indiana i Port Gibson
ma Champion Hill ma sa auai i le osofaʻiga faataamilo i Vicksburg, lea na ia taʻitaʻia ai se vaega na faamamaluina mo gaioiga totoa i le taimi o le osofaʻiga muamua i le 'autau a le fili ia Me 1863. Ina ua maeʻa le taunuʻuga manuia o le Vicksburg Operation, na tumau ai pea le vaega a Washburn ma le XIII Army Corps o loʻo aʻafia i gaioiga i luga o le vaitafe o Teche, ma le manuia o le puʻeina o le tele o Rebel fort. Iā Ianuari 1864, na auina atu ai le 18th Indiana i Virginia lea na auai ai i ni taua malolosi. Iā Aokuso 1864, na faapipii ai le 18th Indiana i le 4th Brigade, 2nd Division (Grover) o le Emory's XIX Army Corps.