Uttar, the prince of Matsya kingdom, died on the first day of the Kurukshetra war. He was protecting his brother's wife, Uttaraa (Abhimanyu's wife), when he was killed. This occurred during the initial battle when the Matsya forces faced the Kaurava army. Yuyutsu survived the war, Abhimanyu died later on day 13, and Ghatotkacha died on day 14.