A strong belief in nationalism, I goodled it :)
Its not 1 because Pilgrams were Christians while Puritans were Catholic.
Its not 2. Because of prior research.
Its not 3, because of logic.
Its not 4 because of the distance of where they lived.
So my logical guess is NUMBER 5.
After the Battle of Antietam in 1862, President Abraham Lincoln announced his intention of freeing all slaves in the Confederacy.