Arjuna and Karna fought by shooting arrows at eachother from their chariots. Arjuna's bowstring broke and he went to fix it While he was fixing it he called for a cease fire because it was 'unmanly' to attack a defenseless foe Karna fired at him anyways wounding him Eventually Karna's chariot had to stop and he called out for a cease fire saying it was 'unmanly' to attack a defenseless foe Arjuna was about to agree, but Krishna called him out and mentioned how he ordered his men to kill Arjuna's son Arjuna heard this and fired at Karna killing him Karna calling for a cease fire Source: Quora References PDE Mahabharata