Expansion of Spain By Tayla Marieeee May 17, 711 Muslims from North Africa take control. May 17, 1469 King Ferdinand II and Queen Isabella marry. This unites the Christian portions of Spain. May 17, 1588 British forces defeat the Spanish navy, and Spain is no longer a sea power. May 17, 1811 Venezuela declares its independence from Spain, and other colonies do the same soon after. May 17, 1931 King Alfonso XIII is forced out, and Spain becomes a republic.