So although Kṛṣṇa is unattached, still He observed the social obligation. There was great fight. All of them lost their relatives. Not only the Kauravas lost everything, but the Pāṇḍavas also. Just like Subhadrā's son Abhimanyu. He was only sixteen years old. His wife, Uttarā, she was once taught by Arjuna. She was disciple, student. Arjuna was teaching her dancing. Virāṭarāja, King Virāṭa's daughter, Uttarā. So they were in disguise. Ajñāta-vāsa. So the Virāṭarāja did not know that Arjuna was living in his house. So this daughter of Virāṭa, Uttarā, when Arjuna was known that he is Arjuna, he requested that "You marry my daughter." So Arjuna said, "No, how can I marry? She is my disciple. She is my student. She is just like my daughter. How can I marry?" Then he promised that "I shall get her married with my son, although he is not very grown up."
So Abhimanyu was Kṛṣṇa's (Arjuna's) son from the womb of Subhadrā. So he was married. Only sixteen years. Almost the same age. Fortunately Uttarā became pregnant. So Abhimanyu went to fight in the Battlefield of Kurukṣetra and never returned. So Parīkṣit Mahārāja was posthumous child. He took his birth after the death of his father. He did not see. Not only father, many. Because it was after the battle. He was the only survivor of the whole Kuru dynasty. So he was also attempted to be killed by Aśvatthāmā by brahmāstra. Kṛṣṇa saved. So Parīkṣit Mahārāja was born after the death of his father. The grandfathers took care of him, and as soon as the child was grown up, all the grandfathers, Pāṇḍavas, entrusted the kingdom to Parīkṣit Mahārāja, and they left home.