Dee ihe na-esote paragraf a - A mụrụ Katsotas n'obodo Stamna dị n'Aetolia-Acarnania n'afọ 1896. Ọ gụsịrị akwụkwọ na Hellenic Army Academy na 1916 dị ka onye agha nke abụọ, wee jee ozi na ndị agha ruo mgbe ọ lara ezumike nká na afọ 1929. Mgbe Agha Gris na Ịtali tiwapụrụ
na 1940, a kpọghachiri ya n'ọrụ, ma lụọ ọgụ n'ihu Albania dị ka onye isi ndị agha na ọkwa nke Lieutenant Colonel. Mgbe ndị Germany wakporo Gris n'April 1941, ọ gbapụrụ n'obodo ahụ ma sonyere ndị agha nke gọọmentị Gris na-achụpụ na Middle East. O weghaara iwu nke 1st Greek Infantry Brigade, nke ya na ya lụrụ ọgụ na Agha nke Abụọ nke El Alamein.