War exercise

A war exercise is a type of military preparation that simulates combat situations and conditions. Some war exercises are planned weeks, months and even years beforehand; others are spontaneous in order to prepare for a surprise attack. War exercises are often called "war games", though this term also refers to simulation wargaming using either a playing board with physical pieces to represent units, or a computer program that simulations the action of war.

Some military exercises are carried out jointly with two or more nations. A type of war exercise nuclear testing.