Western and europeans in general fought each other a lot resulting in superior fighting tactics. Other places did not do this, giving europe a huge edge against everybody.
There was a traditional belief that the <em>Church</em> taught, that is, the focus of life and the universe was God, for He is the Creator of all things, therefore, all human beings should <em>aknowledge and worship </em><em>Him</em>. But some ideas and philosophies had <em>other views</em>, <em>differently from that simple faith</em>, exalting the <em>reason and man</em>, and this should be the new focus, <em>Man and not God</em>.
it depends do you want to focus on military aspects for greek life or the arts and democracy personally i would go with Sparta as you can find a lot more information on greek battle doctrines than say the Athenian battles other than Artemesium strait or the battle of marathon
