Does history have a border? That is the question at the heart of Cinco de Mayo, May 5th, a holiday that symbolizes Mexico's fight for autonomy, even as it's come to be associated with sales and cervezas and margaritas in the U.S. Cinco de Mayo is part of a much deeper story of two nations — Mexico and the U.S. — trying to define themselves at a time when old empires were crumbling and borders were in flux. A story that culminated in a revolution in Mexico that was at the forefront of a worldwide movement against predatory capitalism and foreign domination. So in this episode, we're going back to the first Cinco de Mayo and exploring how it helped shape the future on both sides of the border.