allow him to identify escaped slaves as contrabands of war. butler's controversial decision would eventually inspire thousands of slaves to cross union lines, creating a path for lincoln to entertain the idea of emancipation. >> butler's fort monroe doctrine has an immediate impact on the confederacy. when the union navy invades south carolina's sea islands plantation owners leave behind 10,000 slaves. these new contrabands begin to grow and harvest cotton and other crops for the union, and teachers from the north come to port royal to educate them. >> we did more than patrick henry... >> they seem to be taking to the letters real quick, general. >> once a man has knowledge, he'll not be satisfied unless he also has freedom. i want you to draft an order. if the president is too timid to make a stand, then i will. >> emancipation was happening in