 Pari gbolohun yii: Haller ja Seminole Indians ni Florida ni 18401841 ati nigbamii ti o sin pẹlu iyatọ ni : Monterrey, Veracruz, ati awọn ogun miiran lakoko Ogun Amẹrika-Amẹrika, ti o jẹ olori ni regiment kanna bi Ulysses S. Grant. O ṣe iyatọ ara rẹ ni Ogun ti Churubusco, nibi ti o ti ṣe ipa pataki ninu ikọlu lori Molino del Rey. Ni 1852, awọn Army igbega Haller to Major ati ki o gbe e ni 1853 to Washington Territory, ibudo ni Fort Dalles, Oregon pẹlu US 4th Infantry awọn ẹya. Ó kópa nínú àwọn ogun Northwest Indian ti 1855-56 àti San Juan Islands Pig War border crisis between the United States and Great Britain in 1859. 