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 Fijo de La Habana de Ultramar is a Spanish infantry regiment that fought in America. Battles included Florida (1778), Fort Bute (1779), Baton Rouge (1779), Fort Charlotte (1780), and the Siege of Pensacola (1781).
Source(s): http://peter.mackenzie.org/history/hist51.htm, Image: Durero (wikipedia),