Now, what exactly are we celebrating? Well, it's time for a (condensed) history lesson. Every year, America observes May 5th as a day to celebrate Mexico's defeat of the French army in the Battle of Puebla on May 5,1862. President Benito Juarez had proclaimed that Mexico was too poor to pay its debts to foreign countries. Clearly unhappy about this, the French promptly invaded Mexico to make it a French territory.
Against all odds and despite being outnumbered two to one, Mexico successfully defended itself and claimed victor of the Battle of Puebla. The milestone became a symbol of resistance to French Imperialism, and Americans have embraced the spirit of Cinco de Mayo ever since.
Now that you know what you're celebrating, relax, enjoy a margarita, and fiesta!