November 20: Mexican Revolution Day,This official Mexican holiday commemorates the Mexican Revolution of 1910. Celebrated Monday, November 16, 2009.(oops).
The Mexican Revolution (Spanish: Revolución mexicana) was a major armed struggle that started in 1910 with an uprising led by Francisco I. Madero against longtime autocrat Porfirio Díaz. The Revolution was characterized by several socialist, liberal, anarchist, populist, and agrarianist movements.
Over time the Revolution changed from a revolt against the established order to a multi-sided civil war. After prolonged struggles, its representatives produced the Mexican Constitution of 1917. The Revolution is generally considered to have lasted until 1920, although the country continued to have sporadic, but comparatively minor, outbreaks of warfare well into the 1920s. The Cristero War was the most significant relapse of bloodshed. The Revolution triggered the creation of the National Revolutionary Party in 1929 (renamed the Institutional Revolutionary Party, or PRI, in 1946). Under a variety of leaders, the PRI held power until the general election of 2000.
This music is pretty epic in this vid: