Even if you are not particularly interested in history or the military, this book will fascinate you right from the beginning. It gives you insight into nine great battles fought between 480 B.C. (Salamis) and 1968 (Tet Offensive in the Vietnam War). All battles described are encounters between western and non-western armies and almost all have been won by western countries. Hanson asks himself what factors eventually contributed to these western victories and he comes up with very convincing answers. He maintains that the keystone for military success was laid in ancient Greece. The old Greeks fought uniquely differently from their adversaries (e.g. the Persians or Carthaginians) in so far as their soldiers fought on a sense of personal freedom, superior discipline, matchless weapons, egalitarian camaraderie,, individual initiative, constant tactical adaption and flexibility, preference for shock battle of heavy infantry. All these positive aspects could have only developed in the constitutionally governed Greek city-states where ordinary people voted for their representatives, where there was equality among classes, where soldiers had a say in military affairs, where even the small farmer owned property etc.
Hanson never merely describes the battles, but always gives insight into the economic, social, cultural and political conditions under which soldiers lived and stood up for their countries.
I have never read a better book in terms of military history.