As long as Article IV, Section 1 is followed.
2. the preservation of the union was NOT worth the loss of >1,000,000 lives-including at least 500,000 innocent civilians.
I think it was. Millions were killed in WW2 because certain countries didn't have the ability to fend of Germany and Japan because of their smallness.
if tommorrow 13 states decided to depart the union peacefully i would suggest that is quite acceptable, especially given the war alterenative.
Go for it. How many are with you?
3. to quote Tom Jefferson: "resistance to tyrants is obediance to God".
1860 Southern slaveowners were the most tyrannical is Americas history.