The Spanish conquistadors sailed over the Atlantic to conquer Mexico and Peru in the 16th century.
The only true option from the list would be that "<span>In time a fifth group was added to the caste system--the untouchables," since this was a later development and not an initial part of the system. </span>
The North had very little supplies at Fort Sumter, so they had to fight while being conservative with heir supplies. The South, however, battered the Fort with over 300 shells, until the commanding officer in the Fort inevitably surrendered.
