Annihilation is a military strategy in which an attacking army seeks to entirely destroy the military capacity of the opposing army. This strategy can be executed in a single planned pivotal battle, called a "battle of annihilation". A successful battle of annihilation is accomplished through the use of tactical surprise, application of overwhelming force at a key point, or other tactics performed immediately before or during the battle.
The end goal of a battle of annihilation is to cause the leaders of the opposing army to sue for peace due to the complete annihilation of its army and thus inability to further engage in offensive or defensive military action. It is not necessary to kill or capture all, or even most, of an opposing army's forces to annihilate it in the sense used here. Rather, the destruction of the enemy army as a cohesive military force able to offer further meaningful military offense or defense, even if temporarily, is the objective.
In ancient and classical times, many battles ended with the annihilation of one of the opposing forces, the Battles of Cannae, Zama and Adrianople being famous examples. From the Renaissance onward, however, the battle of annihilation strategy fell into disuse, at least in Europe. The greatest exception is seen in the battles of Napoleon Bonaparte, with whom the battle of annihilation in the modern sense is most closely associated, and term "Napoleonic battle of annihilation" is sometimes used. The Battle of Austerlitz is often cited as the paragon of the modern battle of annihilation.
Napoleon's victories at Austerlitz (1805) and Jena (1806) are often cited as the classic battles of annihilation. Napoleon himself was unable to again achieve such decisive results, partly because his enemies then adjusted to his tactics. For example, the Battle of Borodino was a victory but did not result in the desired destruction of the Russian army.
Nevertheless, strategists, influenced by those of the Napoleonic era, most notably Antoine-Henri Jomini, held the Napoleonic battle of annihilation to be the proper objective of modern military campaigns.