| 1910 | Revolution overthrows dictator Porforio Diaz. |
| 1929 | Party later known as Partido Revolucianario Institucional (PRI) comes to power. |
| 1968 | Hundreds of student protestors die in Tlaletco Massacre. |
| 1988 | Mexicans decry presidential elections as fraudulent. |
| 2001 | Vicente Fox elected president, ending 71 years of PRI rule. |
