On July 29, 1588, the Spanish Unbeatable Fleet was defeated by the British Navy in the English Strait by the British Navy. On July 29, 1588, the Spanish Unbeatable Fleet was defeated by the British Navy in the English Strait by the Spanish Unbeatable Fleet (Ancient Spanish: La Felicissima Armada, the most fortunate fleet in the English War; Modern Spanish: La Armada Invencible, the most invincible fleet in the War). The Spanish Navy was sent by King Philip II in 1588 to conquer England but was defeated by the British Navy. The Unbeatable Fleet (Ancient Spanish: La Felicissima Armada, the most fortunate fleet in the English War; Modern Spanish: La Armada Invencible, the most f