President Abraham Lincoln's plan did not guarantee African American equality.
The Wade-Davis Bill passed by the Radical Republicans demanded guarantees of African American equality. Lincoln killed this bill with a "pocket veto."
http://www.answers.com/Q/How_did_Lincoln's_plan_for_reconstruction_differ_from_the_wade_Davis_bill
Cortes was able to defeat the Aztecs because of his warfare and the skills that they were able to improve back when they defeated the Moores