Yellowstone National Park was given the title of the first national park by the U.S. Congress and signed into law by President Ulysses S. Grant. It is also believed to be the first national park in the world.
1872 · The Amnesty Act
A federal law which reversed most of the penalties on former Confederate soldiers by the Fourteenth Amendment. The Act affected over 150,000 troops that were a part of the Civil War.