Hercules was the son of Jupiter and Alcmena.
Eurystheus, the King of Mycenae and his cousin, made his undergo some difficult tasks, which are known in Greek myths as the twelve labours of Hercues. The first involved a fight with a lion. The valley of Nemea was being disturbed by. A terrible lion and so Eurystheus ordered Hercles to slays the the beast and bring him his skin.
At first, Hercules tried to fight the lion with his club and arrows but this took him nowhere. Then Hercules attempted a different tact: he decided he would use his hands. He thus managed to slay the animal on his own, relying entirely on his immense strength. Victorious, he returned to Mycenae carrying the dead lion on his shoulders, a sight that terrified the king. His next task was to slay a monster called Hydra that was ravaging the country of Argos.
The Hydra had nine heads, of which the middle one was said to be immoeral.Our hero struck off its heads with his club,but whenever he knocked off head, two new ones erupeted in its place.Eventually with the help of his devoted servant lolaus,Hercules succeeded in burning all the heads of the hydra except the ninth or immortal one,which he decided to bury under a huge rock .In other words,Hercules triumphed again,as he would every time he was given an impossible task by Eurystheus! And this is how he began to acquire the reputataion of a hero possessing immense strength throughout the world.