Cinco de Mayo celebrates the Mexican victory over the French at the Battle of Puebla, May 5, 1862. About 4,500 Mexican soldiers, artillery, and cavalry commanded by Ignacio Zaragoza defended a pair of hilltop forts North of Puebla. The overconfident French, commanded by Charles de Lorencez, attacked the forts with about 6,000 soldiers and artillery. The French assaults were repulsed, and Zaragoza counterattacked, flanking the French and forcing their retreat. Zaragoza’s one-line message to Juarez read, ”The national arms have been covered with glory”.
This is an excerpt from a post a couple of years ago. The original post explains why Americans SHOULD celebrate Cinco de Mayo.