Complex sentence: The colunellas were eventually replaced, in the 1530s, by the orders of Charles I of Spain, by the "tercios" that were on paper originally made up of one third pikemen, one third arquebusiers and one third swordsmen.
Split into simpler sentences: The colunellas were eventually replaced by the "tercios" in the 1530s by order of Charles I of Spain. The tercios were on paper originally made up of one third pikemen, one third arquebusiers and one third swordsmen.