Ramba uchinyora ndima iyi - Nokutanga kweHondo Yenyika, Kristu akagamuchira kugadzwa musi waApril 21, 1861, somutevedzeri wemukuru mukuru we5th Pennsylvania Infantry. Akabuda muuto musi wa 25 Chikunguru pakupera kwemwedzi mitatu yebasa rechirongwa. MunaSeptember, akagadzwa kuva colonel we50th Pennsylvania Infantry, uye akapinda muHondo yePort Royal. Nokukurumidza akanga ava mutungamiriri we1st Brigade, 1st Division yeIX Corps. KuChantilly
, akafungidzira kutonga kwechinguvana kweboka rake pakufa kwaIsaac Stevens. Akadzokera kunotungamirira 1st Brigade uye akarwa muhondo dzeSouth Mountain uye kuAntietam pedyo neBurnside's Bridge. Nokukurumidza pashure peAntietam akaendeswa kutungamiri kwe2nd Brigade mu1st Division. Boka iri akaritungamirira paHondo yeFredericksburg. Kristu akanga ari mutungamiri we 3rd Brigade, 2nd Division mu IX Corps panguva yeViege yeVicksburg asi akadzokera kunotungamira 2nd Brigade munguva yeKnoxville Campaign. Muchirimo cha1864, IX Corps yakadzoserwa kuEastern Theater uye Kristu akatora hutungamiriri hwe2nd Brigade mu3rd Division uye akarwa muhondo dzeWilderness, Spotsylvania, Cold Harbor. Apo uto reUnion rakarwisa zvivako zveConfederate paPetersburg, Kristu akakuvadzwa. Akasiya munda kwenguva pfupi chete asati adzoka kuzotungamira 1st Brigade, 3rd Division muIX Corps. Akadzingwa basa musi waSeptember 30, 1864.