Where was the first Memorial Day parade?

According to federal legislation signed in 1966, Waterloo, New York, is the birthplace of Memorial Day, but there are a lot of other towns that claim the honor for themselves. Boalsburg, Pennsylvania, for one, points to a 1864 gathering to honor those killed at Gettysburg as the first-ever Memorial Day, while Carbondale, Illinois, cites a parade in 1866 led by John Logan, who later helped bring the official holiday to fruition.