How did centralized states in 16th- and 17th-century Europe change strategy?

In the 16th and 17th centuries, the development of centralized state structures in Europe fundamentally transformed military strategy, shifting it from a craft into a more professional, scientific discipline.1

Key changes included:

• Rise of Raison d’État: Strategy moved away from the chaotic violence of religious conflicts toward wars waged for raison d’état—to advance the interests of the ruler and the state.1
• Professionalization and Science: Military thought became increasingly systematic. Practitioners began treating war as a science governed by rules and principles, supported by the emergence of military schools and the study of subjects like trigonometry, cartography, and military engineering.1
• Standardization: As armies became state-owned organizations rather than collections of independent units, they were homogenized and disciplined. This included the standardization of tactics, equipment, and logistical systems, such as the use of prestocked magazines and improved road networks to make troop movements more predictable.213
• Fortification and Siegecraft: The development of geometric fortifications (trace italienne) made cities powerful obstacles, turning strategy into a methodical affair of sieges, bombardment, and mining rather than haphazard combat.1

These developments allowed centralized states to exert greater control over their armed forces, effectively taming independent aristocratic military leaders and creating the foundations for modern professional armies.143