Once Upon a Time in a Battlefield, or Hwangsanbul (황산벌), is a Korean comedy movie of 2003. It was directed by Lee Jun-ik. Its plot is about the Battle of Hwangsanbeol between Baekje and Silla in the 7th century.
The movie starts out with a meeting between the rulers of Baekje, Silla, Tang China, and Goguryeo. They are arguing why the Korean southern kingdoms have to pay tribute to China, even though Tang is only 50 years old. The king of Silla sides with the King of Tang. The movie flashes forward to the scene in which Baekje soldiers rush to the king with ill news of Silla and Tang allying together, bringing an army of 50,000 soldiers. The Baekje council discusses battle plans. But in the end, all of the officials run away out of cowardice. The king of Baekje calls for the great warrior, Kyebaek. He accepts the offer to protect his country after three glasses of wine. Kaebaek is forced to kill his family in fear of something worse happening to them.