Udyoga Parva: The book of effort
Udyoga Parva of the Mahabharata (the book of effort): a summary in plain words, book 5 of 18.
The Pandavas return and ask for their share of the kingdom; both sides prepare for war. Krishna goes to the Kuru court as a peace envoy, and asks that the Pandavas be given at least five villages; Duryodhana refuses to give "as much land as the point of a needle". Kunti meets Karna and tells him that he is her eldest son; he refuses to join the Pandavas, remaining loyal to Duryodhana, but promises not to kill any of the brothers except Arjuna. Both armies gather at Kurukshetra.
This is book 5 of the eighteen parvas of the Mahabharata. See all eighteen and the characters.
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A retelling in our own words of a story told in many ways across India and Asia. Tellers differ on many episodes. It is not a scholarly translation.