This block is meant to memorialize the Battle of Shiloh, which occurred in April of 1862. Shiloh was the bloodiest battle of the war up to that point, with almost 24,000 casualties. One of the major outcomes of the battle was the realization, North & South, that the war would not be over quickly and without great loss of life.
I was not overly familiar with the Battle of Shiloh until I read Tony Horowitz' Pulitzer Prize-winning book, Confederates in the Attic. His account of a memorial pilgrimage to Shiloh inspired me to want to visit the battlefield myself. Haven't made it there yet, but I'm hopeful for this April.