Maintaining and increasing one’s freedom to choose and to act: this lies at the heart of strategy ; it is the very art of action. The various degrees of freedom of action represent a true strategic currency, which rises and falls depending on relations with adversaries. It is a currency that has to be spent, as one’s capacity to act diminishes if it lies unused—yet it only exists through the concrete measures at the strategist’s disposal. This freedom of action is central to all strategies at all levels.