The greatest accomplishment of philip ii of spain was to

preside over the growth of a large empire

Explanation:

Philip second has ruled a large empire (1527-1598) and his influence was seen at every continent then known to Europeans. He was the King of Spain, King of Portugal, Lord of Seventeen Provinces of Netherlander and Duke of Milan. His zeal to control England, Ireland and funding the Civil War in France have been motivated by his Catholic Empire. He championed Roman catholic Counter-Reformation in the sixteenth century. His reign was called The Golden Age of Spain for the vast empire he controlled.