Secession was never “legal”. The only way that it could be legal would be an amendment to the Constitution allowing it.
The only states with a shred of a claim to a right to withdraw would be the original 13. But that claim was denied by Madison and Hamilton and later Marshall.
We have a glorious INDIVISIBLE Union which has been the most important new political creation since the Roman Republic.
“Secession was never legal. The only way that it could be legal would be an amendment to the Constitution allowing it.”
Oddly enough, I agree with you on this point. Secession was not legal. And it still isn’t. But when you get to the point of rebellion, it’s long past being a matter of legality.
Concurring Old Flag bump.