On the 13th day of the Mahabharata war, Dronacharya organised the Kaurava army into a chakravyuh formation to challenge the Pandavas.
With the great warrior Arjuna away, there was none among the Pandavas who could counter this. Then came Abhimanyu, Arjuna's son who knew how to break the chakravyuh (labyrinth) and sought permission from Yudhishthira to lead the battle.
Abhimanyu entered the chakravyuh by defeating seven great warriors on the Kaurava side, guarding the seven fronts of the formation. He killed several princes and kings, besides a large number of Kaurava soldiers, sending jitters down the enemy lines. Then flouting all rules of war, a number of great warriors, including Karna, Drona, Jayadrath, Ashwathama and Kripacharya, attacked Abhimanyu together.
Abhimanyu fell, but not before upsetting the Kauravas' plans to wipe out the Pandava army.

