The Greek Soldier

This lesser-known legend tells us of a Greek soldier who, after WWII, was returning home to marry his fiancee. Unfortunately for him, he was captured by fellow Greeks who had hostile political beliefs, tortured for five weeks, and finally eventually murdered. In the early 1950s—mainly in North and Central Greece—there were stories about a very attractive Greek soldier in uniform, who appeared and disappeared overnight, seducing beautiful widows and virgin girls with the sole purpose of impregnating them.

Five weeks after the babies were born, the man would disappear for good—leaving a letter on the table explaining that he had returned from the dead merely to spread his seed, so that his sons might avenge his murder. 

Source: http://listverse.com