When the dying Alexander the Great was asked to whom he bequeathed his vast empire, he supposedly replied 'to the strongest'. There ensued a long series of struggles between his generals and governors for control of these vast territories. Most of these Diadochi, or successors, were consummate professionals who had learnt their trade under Alexander and, in some cases, his father Philip. This second volume studies how they applied that experience and further developed the art of war in a further four decades of warfare. This is a period rich in fascinating tactical developments. The all-conquering Macedonian war machine developed by Philip and Alexander was adapted in various ways (such as the addition of war elephants) by the different successors according to their resources. Siege and naval warfare is also included.