Final answer:
The boy martyr of the Confederacy was William A. Lax, the son of a Confederate soldier and tobacco farmer from Virginia. He joined the Confederate army during the American Civil War, but died as a prisoner of war due to dysentery in May 1865.
Step-by-step explanation:
The boy martyr of the Confederacy refers to William A. Lax, the son of Joel M. Lax, a Confederate soldier and tobacco farmer from Halifax County, Virginia. William A. joined the Confederate army during the American Civil War, but he contracted dysentery and was sent to various army hospitals. He ended up in the Confederate hospital at Chimborazo in Richmond, where he ultimately died as a prisoner of war in May 1865. His family had to wait to learn of his death, as his body had already been buried in a mass grave by that time.