Whakaotihia te rerenga e whai ake nei: Mai i te 1833 ki te 1836, i mahi a Day i te Hancock Barracks, Maine a i mahi ia i Fort Independence, Massachusetts i te 1836. I mahi ia i runga i te mahi whakauru i nga pou rereke mai i te 1836 ki te 1838 a i uru ia ki te Pakanga Seminole o 1838-1839. I mate a Day i Florida, a, i noho ia ki te okiokinga mai i te 1839 ki te 1841. I hoki ia ki Florida i te tau 1841 ka noho tae noa ki te 1842. I mahi ia ki te 2nd Infantry i Buffalo, New York mai i te 1842 ki te 1845 me Detroit, Michigan mai i te 1845 ki te 1846. I uru ia ki te Pakanga o Mexico-Amerika mai i te 1846 ki te 1847, e mahi ana me te 2nd Infantry hei waahanga o te David E. Twiggs 'Brigade me te uru atu ki nga pakanga tae atu ki
Ko Veracruz, ko Cerro Gordo, ko Contreras, ko Churubusco, ko Moline del Rey me Chapultepec.