One of the main factors leading up to the Civil War was territorial expansion into places like Arizona and Texas, with the question being whether these new states would be free or slave. It was in Arizona's interest to side with the slave states.
Answer: Mexico
Explanation: Mexico declared independence from Spain on September 16, 1810, 11 years before the other three countries listed
Because the ships carrying the plague didn’t go their also they were a bit more clean
