Well Turks and Persians etc are not strictly speaking 'brown' but having been brought up on the BBC's special recipe of searching for offence on behalf of others I can clearly see how you got there. Some of the various armies that invaded Hellas used slave soldiers if that is any consolation? Ottomans and Persians were particularly fond of slave armies. The 100s of wars the Greeks fought against invaders were more about stopping the ideologies those invaders brought with them - namely Sunni Islam and a direct contradiction to the Greek's belief in things such as democracy, women's rights and the Mediterranean way of life- from alcohol to the worship of beauty.