- Guadalupe Victoria was Mexico's first president after it became a republic in 1824, during his term he abolished slavery and strengthened Mexico politically and militarily. - Porfirio Diaz ruled as a repressive president from 1876 to 1880, concentrating power and meeting any opposition with violence. - Francisco Madero opposed Diaz's dictatorship and sparked the Mexican Revolution in 1911, leading soldiers against Diaz. However, he was later executed in a coup led by Victoriano Huerta.