 Pún gbólóhùn yìí kún: Nígbà tí Ogun Abẹlé bẹrẹ, Rice wọṣẹ ológun ní 28 May 1861 nínú Ẹgbẹ ọmọ ogun abẹlẹ New York 39th, ó sì yára di ọgágun nínú Ẹgbẹ B, ó sì kópa nínú Ogun Bull Run. Rice ni won gba lati inu 39th New York Volunteer Infantry Regiment ni 12 Sep 1861. Ní ọjọ kejì, Rice di ọgágun ọgágun ti ẹka ọmọ ogun ọmọ ogun ọmọ ogun ọmọ ogun ọmọ ogun New York Volunteer Infantry Regiment tí a ṣẹṣẹ dá sílẹ tí a tún mọ sí Ẹgbẹ ọmọ ogun Ellsworth. O ja ninu Igbimo Peninsula ati ni Oṣu Keje 4, ọdun 1862, o di ọga agba ti regiment. Ni Ogun keji ti Bull Run, Colonel Rice gba aṣẹ ti Brigade 3rd, 1st Division, V Corps nigbati oludari rẹ, Daniel Butterfield gba aṣẹ ti awọn iṣọkan 1st ati 2nd Brigades ati awọn oṣiṣẹ ipo miiran ni o farapa ni ọjọ keji ti ogun. Rice pada si aṣẹ ti 44th New York o si mu u ni awọn ogun ti Fredericksburg ati Chancellorsville. Ní Ogun Gettysburg, Rice àti ẹka rẹ ni wọn rán lọ láti dáàbò bo Little Round Top. Nigba ija, olori brigade Colonel Strong Vincent ni o farapa ni ipalara ati Rice lẹẹkansi gba aṣẹ ti 3rd Brigade, 1st Division, V Corps ati ki o mu u fun iyokù ti ogun. Fun iṣẹ rẹ ni Gettysburg, Rice ni igbega si olori olori ti awọn oluranlọwọ ni August 17, 1863. Ni Oṣu Kẹta, ọdun 1864 Gbogbogbo Rice ni aṣẹ ti Brigade 2, Ẹka kẹrin, V Corps eyiti o mu ṣiṣẹ ni Ogun ti Wilderness. Rice ni wọn fi ọgbẹ pa nígbà ìjà náà. : Ìjà ní Ilé Ẹjọ Spotsylvania. Bí ó ti ń kú lọ, ó ń kùn pé: Ẹ fi mí lé àwọn ọtá lọwọ kí n lè kú lójúkojú. Ó kú níbi ìjà Spotsylvania ní May 10, 1864. Wọn sin ín sí Albany Rural Cemetery, Meds, New York, ní ìpínlẹ 42, ìpínlẹ 11. 