One of the main events was his birth as Siddhartha Gautama in a royal family. He then witnessed the Four Passing Sights - an old man, a sick man, a corpse, and an ascetic. This led him to leave his luxurious life in search of the truth. Eventually, he achieved enlightenment under the Bodhi tree and became the Buddha, spending the rest of his life teaching the Dharma.
Siddhartha Gautama's life story is full of significant events. His birth was a special occasion as he was born into royalty. However, his encounter with the realities of old age, sickness, and death made him question the purpose of life. He decided to renounce his worldly possessions and embark on a spiritual journey. During his search, he practiced extreme austerities which he later realized were not the way. Finally, under the Bodhi tree, he reached enlightenment and his teachings became the foundation of Buddhism.