In the 19th century, Díaz had been a national hero, opposing the French Intervention in the 1860s and distinguishing himself in the Battle of Puebla on 5 May 1862 ("Cinco de Mayo").
Lincoln rejected Fremont's two emancipation attempts
U.S.
May, 1862
Lincoln rejected Fremont's two emancipation attempts in August 1861, as well as one by Major General David Hunter in May 1862, on the grounds that it was not within their power, and would upset loyal border states.