Lemuel B. McConnico was born around 1846 in Tennessee to William and Caroline McConnico. His father was a lawyer who owned $2,000 of personal property by 1860. He grew up and attended school in Williamson, Tennessee.
He enlisted in the Confederate army, and he mustered in as a sergeant in Company E of the 10th Tennessee Infantry. Union forces captured him at Fort Donelson in February 1862 and imprisoned him at Camp Douglas in Illinois. He was exchanged several months later, and he was promoted to 2nd lieutenant in October 1862. He was wounded in September 1863, and he spent several months recovering. By the spring of 1865, he was a patient at Ocmulgee Hospital in Macon, Georgia. He “escaped” from Union forces on April 28, 1865.
He settled in Brownsville, Tennessee, after the war, and he married Mary Cage. They apparently had no children. By 1880, he was working as a constable. He died sometime after 1880.