Complex sentence: Legazpi declared the area of Manila as the new capital of the Spanish colony on June 24,1571 because of its strategic location and rich resources and proclaimed the sovereignty of the Monarchy of Spain over the archipelago.
Split into simpler sentences: Legazpi declared the area of Manila as the new capital of the Spanish colony on June 24,1571 because of its strategic location and rich resources. He also proclaimed the sovereignty of the Monarchy of Spain over the all the archipelago.