If the Union invaded the southern part of the USA why is it shocking for The Confederacy (Lee) to invade the northern part of the USA?
Color me confused.
Color me confused.
My reference to the "USA's invasion of the USA" was an oxymoron designed to remind another poster that the South remained part of the USA despite the fact that some people in the South pretended to "secede" from the USA. There was never any such thing as a "secession" from the USA. That was just a theory concocted by some folks who wanted to give their actions the appearance of legality.
As many prominent Southerners later acknowledged, what we call the Civil War was actually a rebellion. There have been other rebellions in our history, beginning with the Whiskey Rebellion during the presidency of George Washington.
Your confusion was understandable. The so-called "secessionists" did all that they could to distort the Constitutional principles that bind us together as "One nation, under God, indivisible." Since the adoption of our Constitution, we have been a country created by "We the People of the United States of America" and a relatively small group of slaveholders had no power to change that reality. But, that's what the rebellion was all about.