Answer:
He tried to overthrow Zeus for the power to have control of the heavens.
Step-by-step explanation:
Zeus was the most high of the Olympian gods, overlooking the many people and Gods and demi gods. Atlas had wanted to have the same power or authority that Zeus had. So, he formed an army of the Titans and fought against the Olympian gods for the power to have control of the heavens. As a punishment for this treachery and revolt, Zeus punished him with an eternal punishment, that of holding the heavens on his shoulders, supporting it and never able to let go.