War was more than an opportunity for physical excitement or the chance to win reputation through deeds worthy of being recorded for the benefit of others. War was widely regarded as a way of securing peace and justice. Differences between religious and social systems lay behind wars fought mainly at the extremities of Europe. The most decisive development was the move towards centralisation of military organisation and command which was to be achieved in many parts of Europe. The requirement to avoid the collective consequences of defeat led to societies choosing both soldiers and, in particular, leaders from among those who had good practical experience of war. The war involving England, France and Burgundy, fought largely in the north and north-east of France, advanced considerably the use of heavy artillery in that part of Europe. War helped to stimulate the development of economies associated with it, in particular the provision of armaments and the materials which went into their making.