Who is the Kaurava Warrior whome Arjuna Pledges to kill before the end of the days war or set himself on fire and die?

In the Mahabharata, Arjuna took a terrible vow to kill Jayadratha by sunset of the next day or end his own life, because Jayadratha had helped prevent Arjuna's son Abhimanyu from escaping the chakravyuh formation, leading to Abhimanyu's death. Despite the Kauravas protecting Jayadratha with a layered formation, Arjuna fulfilled his vow on the 14th day of war.