The Battle of Antietam was the single bloodiest day of the American Civil War and is considered one of the major turning points of the war. ... The North was able to use the victory to raise morale, keep the South from gaining diplomatic recognition, and emancipate the slaves in the rebel states.
A shogunate is most similar to a "military dictatorship" in terms of a relevant modern government, since each leader (Shogun) was a hereditary military dictator in Japan.
The Tenth Amendment declares, "The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people." In other words, states have all powers not granted to the federal government by the Constitution.