Fighting a defensive war.
Robert E. Lee wanted to take the war to the Union, on Union ground. Most of his victories had been in or near Army of Virginia home soil.
Going north was an attempt to shorten the war as he knew a prolonged war of attrition favored the industrial and populous north.
Father against son, brother against brother. A very sad time.
The victory in the landmark court case called Brown v. Board of Education of Topeka, Kansas.
The Haitian revolution was a successful revolution run by slaves. This made many countries with slave heavy societies completely shun Haiti and cut trading ties with them.