Flourished: 1832 Tazewell County, Illinois
From April to June of 1832, McJenkins served in two different companies of mounted volunteer milita in the Black Hawk War. In one of those, he served alongside Abraham Lincoln. In June, McJenkins re-enrolled in another of Lincoln's companies, but he was listed absent without leave.
Muster Roll of Captain Jacob M. Early’s Company of Mounted Volunteers; Muster Roll of Captain Elijah Iles’s Company of Mounted Volunteers; Ellen M. Whitney, comp., The Black Hawk War, 1831-1832: Illinois Volunteers, vol. 35 of Collections of the Illinois State Historical Library (Springfield: Illinois State Historical Library, 1970), 1:184, 228-29, 545-56.