Between 1779 and 1782, Spanish rangers from the region around San Antonio herded more than 10, 000 cows over 500 miles to Louisiana to help feed Spanish soldiers fighting the British in the American Revolutionary War. Spain had joined the war on the patriots’ side in 1779 and would spend the next four years contributing a deluge of soldiers, sailors, ships, and cows to the war effort. University of Maryland historian Richard Bell reveals the hidden history of Spain’s participation in the American Revolution.