The Final battle at Kurukshetra
When the Pandavas after many hardships and exile return, they first request for a peace treaty with them gaining Indraprasth back.
However, Duryodhan disagrees as he begins to argue that since the Pandavas where "caught" in their year of hiding, they must go into another 13 years before they can have Indraprasth.
The Pandavas on Krishna's advice then again as for another peace treaty asking for at least five villages for the five brothers from the Kauravas' vast kingdom. Duryodhana refuses to give in.
Krishna goes to broker peace but fails. War becomes inevitable. The two sides summon vast armies to their help and line up at Kurukshetra for a war.
The Kingdoms of Dwaraka, Kasi, Kekaya, Magadha, Matsya, Chedi, Pandya and the Yadus of Mathura and some other clans like the Parama Kambojas from Transoxiana were allied with the Pandavas;
the allies of the Kauravas comprised the kings of Pragjyotisha, Anga, Kekaya (Kekaya brothers who were enemies of the Kekeya brothers on the Pandava side), Sindhudesa (including Sindhus, Sauviras and Sivis), Mahishmati, Avanti in Madhyadesa, Madras, Gandharas, Bahlikas, Kambojas (with Yavanas, Sakas, Tusharas etc) and many others.
Seeing himself facing grandsire Bhishma and his teacher Drona on Duryodhana's side due to their vow to serve the state of Hastinapur, Arjuna is heartbroken at the idea of killing them and fails to lift his Gandiva.
Krishna who has chosen to drive Arjuna's chariot wakes him up to his call of duty in the famous Bhagavad Gita section of the epic.
Though initially sticking to chivalrous notions of warfare, the Kauravas and Pandavas soon descended into dishonourable warfare.
(Shown here is the scene when Arjuna stops
Krishna from attacking Bhishma during the Kurukshetra war.)
At the end of the 14 days slaughter only the Pandavas and Krishna survive with a few old warriors from the Kaurava side.
(death of Bhishma, on bed of the arrows)