Final answer:
The statement is false; the atrocity it refers to is the Fort Pillow Massacre in Tennessee, not an event at Andersonville Prison in Georgia.
Step-by-step explanation:
The statement that Confederate troops shot to death more than 200 African-American prisoners at Andersonville is false. The mentioned atrocity did not occur at Andersonville but refers to the Fort Pillow Massacre. This incident, where Confederate soldiers under Major General Nathan Bedford Forrest slaughtered black Union soldiers after they had surrendered on April 12, 1864, took place in Tennessee, not at Andersonville Prison in Georgia.
Andersonville was notorious for its harsh conditions and high mortality rate, but it was not the site of the execution of African-American prisoners mentioned in the statement. The massacre at Fort Pillow became a symbol of Confederate ruthlessness and contributed to the North's refusal to engage in prisoner exchanges with the Confederacy.