Modern crises are more complex and more difficult to comprehend. Purely military responses cannot be an effective long-term solution. Only an overall approach to crisis resolution enables their root causes, declared or latent, to be tackled. Most countries that are major players in crisis resolution around the world attempt to define methods, procedures or organisations to achieve this comprehensive approach. USJFCOM, the US command in charge of transformation, is organising multinational experiments to test concrete solutions to real cases. France, which is participating in this, is in charge of the development of a politico-strategic interministerial and international planning guide.