Rubuta ci gaba don wannan sakin layi - Hanson ya shiga cikin Marine Corps a 1916 kuma ya yi aiki a lokacin yakin duniya na 1. An sanya shi zuwa 75th Company, 1st Battalion, 6th Marine Regiment. Hanson ya shiga cikin yakin Belleau Wood
, Yaƙin Château-Thierry da sauran yaƙe-yaƙe da yawa.