In the words of a former Chief of Staff of the United States Air Force, General Curtis LeMay, at the very heart of warfare lies doctrine. Until the end of the Cold War, the development of doctrine was focused on protection against a possible attack by Warsaw Pact countries.
This changed in 1989 when the Iron Curtain was pushed aside. At the same time, the Netherlands armed forces quite suddenly began participating in crisis-response missions all over the world as a result of the changing security situation.
In response, the armed forces initiated the development of new doctrine which describes the foundations, principles and conditions of military operations. The doctrine provides an answer to the question of how such operations must be carried out. In view of the principle of joint operations, a comprehensive defence doctrine was formulated instead of a separate version for each Service.