In the 1990s a new era of cooperation in the United Nations Security Council saw a change in the frequency with which the Council authorised action and in the scope of the action authorised. The situation of the multinational armed force in Bosnia and Herzegovina changed greatly from the time troops were first deployed in 1992 to the missions of the late 1990s. In 1992 and 1993 the British Army began to shape what was called Wider Peacekeeping, what the authors call the 'Dobbie doctrine'. Legitimation in strategic peacekeeping has three elements. The first of these concerns the bases for legitimation, which in terms of peace-support operations (PSOs) means the mandate provided by the relevant Security Council resolutions, as well as why people believe they are there, irrespective of those resolutions, de facto what they are actually doing. The second element is performance, which relates to military culture. The final layer of legitimation is support.