Kọ́kọ́ parí gbólóhùn yìí: Nígbà tí wọ́n dá Ilé Ẹ̀kọ́ Gílíádì ti Ìpínlẹ̀ New York sílẹ̀ ní ìlú Ovid, ní ìpínlẹ̀ New York, Kimball di Ọ̀jọ̀gbọ́n nínú Ìmọ̀ Ìjìnlẹ̀ nípa Ìṣẹ̀dá àti Ìmọ̀ Ìjìnlẹ̀ Nípa Ìṣúnná Owó. Pẹlu ibesile Ogun Abẹle Amẹrika ni ọdun 1861, a yan oludari ile-ẹkọ giga, Maj. M. R. Patrick si Brigadier-Generals of Volunteers; Kimball di Olori ti Awọn oṣiṣẹ Brig. Gbogbogbo Patrick, pẹlu ipo olori. O ri iṣẹ aaye labẹ Maj. Gen. Irvin McDowell, o si wa ni Igun Keji ti Bull Run (Oṣù Kẹjọ 28-30, 1862); awọn
Ogun ti Chantilly (September 1, 1862); Ogun ti South Mountain (September 14, 1862); Ogun ti Antietam (September 17, 1862); Ogun ti Fredericksburg (December 11-15, 1862); Ogun ti Chancellorsville (April 30-May 6, 1863); ati Ogun ti Gettysburg (July 1-3, 1863). Brig. Gen. Patrick ni wọn yan si Provost Marshal ti Army of the Potomac, ti Captain Kimball si tẹle e lọ si ibẹ, ti o ṣiṣẹ lori Igbimọ Gbogbogbo labẹ Awọn Gbogbogbo George B. McClellan, Ambrose Burnside, Joseph Hooker, ati George Meade lẹsẹsẹ.