It isn't...
Then what is rebellion? Are there magic words like "I am invoking my natural rights" or "I declare that my house is a different country now" that make it improper for government to oppose an armed uprising?
Active attempt to overthrow a government.
Are there magic words like "I am invoking my natural rights" or "I declare that my house is a different country now" that make it improper for government to oppose an armed uprising?
What armed uprising? Did you not forget that the government sent armies into the seceded states, and not the other way around?
As the black people say, "Don't start no trouble, won't be no trouble."