You would have to shoehoen secession into that in order to make it fit. Once the South seceded, the Constitution and the laws of the United States no longer applied. It would be like withdrawing your membership from a private country club but still having them trying to enforce their "jacket and tie only" policy. Once you're out of the club the rules no longer apply.
Once the South seceded, the Constitution and the laws of the United States no longer applied. Fantasy.
The Militia Act --assumes-- that the state government has been perverted or overthrown. It was passed at the request of George Washington.
It was one of the grounds cited by the Supreme Court in 1862 for the propriety of President Lincoln's actions. President Lincoln was required by his oath to resist the overthrow of the lawful government.
I don't care what you heard as a toddler.
Walt