Mezue ahịrịokwu na-esonụ: Mgbe Agha Obodo malitere na 1861, Magruder hapụrụ ndị agha Union iji nakwere ọrụ na Confederacy. Dị ka ọchịagha nke Ndị Agha nke Peninsula, o wusiri Peninsula Virginia ike ma merie Agha nke Big Bethel. N'agha nke Peninsula, ọ kwụsịrị ndị agha McClellan nke Potomac n'èzí Yorktown, na-ekwe ka Maj. Gen. Joseph E. Johnston bịarute na nkwado, hazie ịlaghachi azụ, ma chebe isi obodo Confederate, Richmond. A katọrọ Magruder maka idu ndú ya n'agha ndị a lụrụ na
Savage's Station na Malvern Hill n'oge Agha Ụbọchị Asaa. Ọ nọrọ oge fọdụrụ n'agha ahụ na-elekọta mpaghara Texas, New Mexico, na Arizona na Ngalaba Arkansas; n'oge ọ na-arụ ọrụ, Magruder wepụrụ mgbochi ụgbọ mmiri na Galveston wee weghachite obodo ahụ na 1863.