During the American Revolution Spain supported the American cause with supplies. They were was also at war with Britain at the time and engaged in battles around the world, including America. Regimiento de Infantería Sevilla nº 40 is a Spanish infantry regiment that fought in America. Battles included the Battle of St. Louis (1780), Battle of St. Joseph (1781), Fort Natchez (1781), and the Siege of Pensacola (1781).
Source(s): http://peter.mackenzie.org/history/hist51.htm, Image: Durero (wikipedia),