From fellow blogger Spartan Cops I found this excellent website:
The author of the fantastic book “The Gates of Fire” has an online series exploring the Warrior and the Warriors Code of Honor. He writes;
These posts are intended for our men and women in uniform, but I hope that artists, entrepreneurs and other warriors in other walks of life will find them useful as well. The series examines the evolution of the warrior code of honor and “mental toughness.” It goes back to the ancient Spartans and Athenians, to Caesar’s Romans, Alexander’s Macedonians and the Persians of Cyrus the Great (not excluding the Garden of Eden and the primitive hunting band). Sources include Herodotus, Thucydides, Plutarch, Xenophon, Vegetius, Arrian and Curtius–and on down to Gen. George Patton, Field Marshal Erwin Rommel, and Israeli Minister of Defense, Moshe Dayan
I can tell where I will be spending some time reading soon.