The Spanish military was an important component of the Spanish Empire and became more powerful over time.

The Spanish military played a crucial role in the establishment, expansion, and maintenance of the Spanish Empire. From the early conquests in the 15th century to the height of its power in the 16th and 17th centuries, the Spanish military was a formidable force that was instrumental in spreading Spanish influence and controlling vast territories around the world.

During the initial phase of exploration and conquest, the Spanish military, particularly the conquistadors, led the way in the Americas, capturing territories such as present-day Mexico, Peru, and much of South America. These conquistadors were primarily motivated by wealth and glory, and they often acted independently or with the support of wealthy Spanish patrons. However, their actions were sanctioned and supported by the Spanish crown.

As Spain's colonial empire grew larger, the military played a vital role in defending and maintaining control over the conquered territories. Spain faced numerous challenges, both from rival European powers and from indigenous resistance. The Spanish military developed effective strategies and tactics to overcome these challenges, such as the use of cavalry, arquebusiers, and later, musketeers. They also utilized naval power to protect their overseas territories and transport troops and resources.

The Spanish military's power reached its zenith during the reign of the Habsburg dynasty in the 16th and 17th centuries. Spain became the dominant global empire, holding territories in Europe, the Americas, Africa, and Asia. The Spanish Army, known as the Tercios, became renowned for its discipline, organization, and effectiveness on the battlefield. The Tercios, composed of professional soldiers, played crucial roles in notable events like the Battle of Pavia (1525) and the Battle of Lepanto (1571).

Moreover, the Spanish Navy, under the command of explorers like Christopher Columbus and Ferdinand Magellan, ventured into unknown waters, establishing global trade routes, and asserting Spain's dominance on the seas. The navy successfully defended important Spanish ports and enabled the transportation of wealth from the colonies back to Spain.

However, as time went on, Spain's military power began to decline due to economic troubles, lengthy wars, and a lack of institutional reforms. The empire faced increased competition from other European powers, especially England, France, and the Netherlands. These factors, combined with a widening technological gap, weakened Spain's military capabilities.

In conclusion, the Spanish military was an integral part of the Spanish Empire, contributing significantly to its establishment, expansion, and defense. Their influence was visible across the globe, and they played a crucial role in enforcing Spanish dominance during the empire's peak. However, as the empire faced various challenges and its power waned, the Spanish military's influence declined as well.