The French had landed in Mexico (along with Spanish and English troops) five months earlier on the pretext of collecting Mexican debts from the newly elected government of democratic President (and Indian) Benito Juarez. The English and Spanish quickly made deals and left. The French, however, had different ideas.

Under Emperor Napoleon III, who detested the United States, the French came to stay. They brought a Hapsburg prince with them to rule the new Mexican empire. His name was Maximilian; his wife, Carolota. Napoleon's French Army had not been defeated in 50 years, and it invaded Mexico with the finest modern equipment and with a newly reconstituted Foreign Legion. The French were not afraid of anyone, especially since the United States was embroiled in its own Civil War.

The French Army left the port of Vera Cruz to attack Mexico City to the west, as the French assumed that the Mexicans would give up should their capital fall to the enemy -- as European countries traditionally did.

Under the command of Texas-born General Zaragosa, (and the cavalry under the command of Colonel Porfirio Diaz, later to be Mexico's president and dictator), the Mexicans awaited. Brightly dressed French Dragoons led the enemy columns. The Mexican Army was less stylish.

General Zaragosa ordered Colonel Diaz to take his cavalry, the best in the world, out to the French flanks. In response, the French did a most stupid thing; they sent their cavalry off to chase Diaz and his men, who proceeded to butcher them. The remaining French infantrymen charged the Mexican defenders through sloppy mud from a thunderstorm and through hundreds of head of stampeding cattle stirred up by Indians armed only with machetes.