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.
Abraham and isaac??um just two guesses of mine.
Zheng forced the rulers of defeated states to move to his capital, Xinyang, to ensure that they were not plotting rebellion is your answer .-.
Many cultures and races blended together