Pedzisa mutsara unotevera: Pashure pokusimudzirwa kwake kuva kaputeni, Morrison akabatanazve ne20th Infantry Regiment, iyo yakaenda kuMobile, Alabama mukugadzirira kuendeswa kuCuba munguva yeHondo yeSpain neAmerica. Akashanda muCuba muhondo yose, kusanganisira Kurwiswa kweSantiago. Morrison akagamuchira Citation Star nokuda kwoushingi munguva ye
Hondo yeEl Caney. Apo mubairo weSilver Star wakagadzirwa muna 1918, nyeredzi yaMorrison yakashandurwa kuita menduru itsva.