We perform stable isotope analysis in human bones and teeth for the identification of Greeks killed in military operations during the Greek-Italian War 1940-41, by categorizιng human remains (eg bones, teeth) according to the predicted geographical area that the individual lived before death and their eating habits, which could facilitate the overall task of genetic identification. Specifically, we correlate the ¹³C, ¹⁵N, ¹⁸O isotopes of human bones and ¹³C, ¹⁸O of human teeth with the geographically controlled ¹⁸O isotope of water in order to estimate the place in which they  lived before death and to reconstruct their dietary habits.