Answer :

Under Charles V, Spanish power grew due to:

1. Inheritance of Territories: Charles V inherited a vast empire that included Spain, the Spanish Netherlands, parts of Italy, and colonies in the Americas. This inheritance immediately increased Spanish power and influence.

2. Control of Resources: Spain had access to abundant resources from its colonies in the Americas, such as gold, silver, and other valuable commodities. This influx of wealth strengthened the Spanish economy and military.

3. Military Conquests: Charles V conducted military campaigns to expand Spanish territories. His victories, such as the conquest of the Aztec and Inca empires in the Americas, further enhanced Spanish power.

Under Philip II:

1. Consolidation of Power: Philip II focused on consolidating Spanish territories and centralizing power. He strengthened royal authority and promoted Catholicism, which helped unify Spain under a strong centralized government.

2. Naval Power: Philip II invested heavily in building a powerful navy, particularly the Spanish Armada. This naval force allowed Spain to control key trade routes, protect its colonies, and project power internationally.

3. Territorial Expansion: Despite facing challenges like the defeat of the Spanish Armada, Philip II continued to expand Spanish territories through conquests in Europe, Africa, and Asia. This expansion increased Spanish influence globally.

In summary, under both Charles V and Philip II, Spanish power grew through inheritance, resource control, military conquests, consolidation of power, naval strength, and territorial expansion. Their reigns marked periods of significant growth and influence for the Spanish Empire.