Lynn N. Bock

Confederate Major General John P. McCown was sent to plug the breach by fortifying Island No. 10, a one-mile-long island positioned in a bend in the Mississippi River that straddled the boundaries of Tennessee, Missouri, and Kentucky. Pope's army had to be held in check long enough for the main Confederate force, under generals Albert Sidney Johnston and P. G. T. Beauregard, to concentrate and launch a counterattack against Grant's advancing army.