At birth, Siddhartha was given a prophecy. The prophecy spoke of him having a choice. He could become a king that united India, or a religious leader. His father from that moment began to take him on the path of the king.
Growing up Siddhartha was shielded from anything unpleasant. (The poor, weary, diseased, old, and dead.) Guards would clear the people from the streets that were "unfit" to be in his presence. They would then proceed with the prince.
Although he had been protected his whole life, the prince one day was faced with the true sorrows of reality. Siddhartha saw someone infected with disease, a dead man, a poor man, and a elderly man. He then decided at that moment that he wanted to make a change to the suffering.
Siddhartha rid himself of all his royal attire and escaped off into the woods to join a band of ascetics practicing ultimate self-denial. After have been in the group of ascetics for about 5 years, Siddhartha fell ill on having not eaten enough. Still unable to grasp the concept on how to end suffering, Siddhartha leaves and travels on his own.
After meditating under a Bodhi tree for 49 days, Siddhartha reaches a state of enlightenment. He had gained knowledge of how to end the suffering of life and how we can pass on to a perfect state of happiness. He had gained knowledge of how to become awake and had become the Buddha.
Siddhartha then traveled home explaining the ways of life to his parents, wife, and son. Asking them to come with him on this great journey. Finally convincing them, Siddhartha lived as the Buddha traveling around until the 80th year of his life, teaching people the new ways of enlightenment. He died at age 80, one one of the important people to ever walk the Earth.