The Supreme Personality of Godhead, Sri Krsna, known as lila-purusottama, appeared as the son of Vasudeva but immediately left His father's home and went to Vrndavana to expand His loving relationship with His confidential devotees. In Vrndavana the Lord killed many demons, and afterwards He returned to Dvaraka, where according to Vedic principles He married many wives who were the best of women, begot through them hundreds of sons, and performed sacrifices for His own worship to establish the principles of householder life.
Thereafter, Lord Sri Krsna created a misunderstanding between family members just to diminish the burden of the world. Simply by His glance, He annihilated all the demoniac kings on the Battlefield of Kuruksetra and declared victory for Arjuna. Finally, He instructed Uddhava about transcendental life and devotion and then returned to His abode in His original form.
SB 9.24.66,67 text
(As stated by Srila Visvanatha Calravarti Thakura, these two verses summarize all of the pastimes of Krsna when He appeared in this world 5,000 years ago.
These two verses are the last in the ninth canto; the stage is set for the tenth.)