<prompt> Qedela umusho olandelayo: UDuncan wazalelwa futhi wakhulela emaphandleni aseChanceford Township eningizimu-mpumalanga yeYork County, ePennsylvania, emngceleni woMfula iSusquehanna obanzi. Waqokwa e-United States Military Academy ngoJulayi 1, 1845, futhi waphothula eWest Point ngoJuni 1849. Wayengumfundi omuhle, waba ngowesihlanu ekilasini labangu-43. Ngesikhundla sakhe esiphakeme semfundo, waphakanyiswa waba nguthisha wesibili futhi wabelwa e-Second U.S. Artillery ngoJulayi walowo nyaka. Kungekudala ngemuva kwalokho, ngo-Okthoba 31, wanikezwa isikhundla esiphelele sokuba ngu-lieutenant wesibili futhi wabelwa kabusha e-Third Artillery. Wabona isenzo sakhe sokuqala sokulwa ekhonza e  <response>: Izingxabano zaseFlorida namaNdiya angamaSeminole. 