Achilles
Achilles was the strongest and most fearless warrior in the Greek war against the Trojans. As an infant his mother dipped him into the River Styx, which made him invulnerable everywhere but the heel by which she held him. His mother, before the war, made him choose between long life with a wife, children, grand-children, but being unpopular or going to war, become very popular but would be killed after the war. Of course, being arrogant, Achille chose to go to war and for ten years, Achilles had been a great hero in the Trojan War. But in the end Paris, son of the Trojan king, fatally wounded Achilles in the heel with an arrow. Today, the tendon that connects the calf muscles to the heel bone is called the Achilles tendon, and a small but dangerous weakness is known as an "Achilles heel."
