On October 14, 1861, Brigadier General Ulysses S. Grant replied from Cairo, Illinois, to Confederate Major General Leonidas Polk, who had proposed an exchange of prisoners captured along the Mississippi River. Polk, Grant’s former West Point classmate and a former Episcopal bishop who had taken a Confederate command, sought an arrangement during the uncertain early months of the war.
Grant’s response was deliberately careful. “I recognize no Southern Confederacy myself,” he wrote, refusing to enter a formal agreement that might imply diplomatic equality between the United States and the Confederacy. Yet he did not simply reject humanitarian action: Grant returned three Confederate prisoners through the lines, while instructing the officer conducting them to avoid formal negotiations with Confederate officials. Polk responded by returning sixteen Union soldiers, and the two commanders continued limited exchanges for several weeks.
The episode reflected Lincoln administration policy in principle: the Union was perpetual, secession had no legal validity, and Confederate officers were commanders of insurgents rather than representatives of a foreign government. In practice, however, Grant showed that Union commanders could manage practical prisoner releases at the local level without conceding the Confederacy’s political legitimacy. The exchange anticipated the legal and political tensions that would shape prisoner-of-war policy throughout the war, though it should not be read as a direct precursor to Grant’s later unconditional-surrender policy.
