3.7 The Nature of Warfare

New Weapons, New Tactics

Warfare in the 16th–18th centuries transformed with gunpowder weapons like muskets and cannons. Armies shifted from armored cavalry and pikemen to infantry with firearms, requiring drilled, disciplined formations. This shift is part of the Military Revolution, which demanded better-trained, standing professional armies rather than feudal levies or mercenaries alone.

Bigger Armies, Bigger Costs

States built massive standing armies to fight prolonged wars, especially during the Thirty Years' War (1618-1648). This required increased taxation and centralized bureaucracies to fund and supply troops, strengthening monarchical power. Rulers like Louis XIV used war financing to justify absolutist control over resources and nobility.

War Reshapes the State

Constant warfare pushed governments to develop tax collection systems, standing bureaucracies, and centralized military command. This fueled the growth of fiscal-military states, where the ability to fund and organize warfare determined a state's power. The Peace of Westphalia (1648) ended the Thirty Years' War, affirming state sovereignty and reshaping the European balance of power.

Key terms

Military Revolution

The transformation of warfare through gunpowder weapons, disciplined infantry tactics, and larger, professional standing armies.

Thirty Years' War

A devastating conflict (1618-1648) in Central Europe involving religious and political struggles, ended by the Peace of Westphalia.

Peace of Westphalia (1648)

Treaty ending the Thirty Years' War; established the modern principle of state sovereignty.

Fiscal-military state

A state structured around taxation and bureaucracy primarily to fund and sustain military power.

Standing army

A permanent, professional military force maintained by the state even in peacetime, requiring significant funding.

Try an AP-style question

The Military Revolution of the 1500s–1600s involved…

1. abolishing armies in most kingdoms
2. changes to navies and nothing else
3. a return to armored knights on horseback
4. gunpowder weapons and larger standing armies