Ia tusia se fa'aauau mo lenei palakalafa - I le auai ai i le Union Army ia Me 1861, na ia mauaina ai se tofiga o se ofisa i le 9th New York Volunteer Infantry Regiment, e lauiloa o le "Hawkins' Zouaves", ma mulimuli ane o le IX Army Corps lea na ia tautua ai i lalo o le ta'ita'iga a le General Benjamin Butler i le Taua o Big Bethel ma le Hatteras Inlet expedition
. I le 1862, na ia malaga faatasi ai ma le Army of the Potomac i le General Ambrose Burnside's Roanoke expedition ma auai ai i taua o Hatteras Inlet, Roanoke Island, South Mountain, Antietam ma Fredericksburg. Na faalua ona manuʻa o ia i le taimi o le tauvaga, ma na siitia ai Jardine i le tulaga o le major ona o lona "amio toa" ma na ia taʻitaʻia puupuu le 89th New York Infantry Regiment.