_ Several parts of the country were controlled by Spain or Native
American populations. Enslaved individuals were often able to escape
and find assistance at the Spanish-controlled Fort Mt. Mose in St.
Augustine, Florida, or with Seminole populations in other parts of
Florida. While Underground Railroad activity was concentrated mostly in
the regions of the Ohio River and the Chesapeake Bay, many enslaved
individuals escaped further south to the regions controlled first by
Spain and later by Mexico. Though these areas saw very little
Underground Railroad activity, many enslaved individuals escaped there
seeking their freedom.