Shiloh National Military Park was established in 1894 to preserve the scene of the first major battle in the Western theater of the Civil War. The two-day battle, April 6 and 7, 1862, involved about 65,000 Union and 44,000 Confederate troops, resulting in nearly 24,000 killed, wounded, and missing. It proved to be a decisive victory for the federal forces when they advanced on and seized control of the Confederate railway system at Corinth, Mississippi. The park has within its boundaries the Shiloh National Cemetery along with the well preserved prehistoric Indian mounds that are listed as a historic landmark. Leashed pets are permitted in the park, but are not allowed in the buildings. Leashes must be no longer than six feet.