Battlefield Heroes () is a 2011 South Korean war comedy film directed by Lee Joon-ik. The film is a sequel to the 2003 film Once Upon a Time in a Battlefield and stars Jung Jin-young, Lee Moon-sik and Ryu Seung-ryong. The film is set in 668 and chronicles the war between the southern Korean state of Shilla against the larger northern Korean state of Goguryeo. The film's box office returns were lower than expected in South Korea, which prompted Lee Joon-ik to announce his retirement shortly after the film's release. The film has been shown at the New York Asian Film Festival and Fantasia Festival. Plot In Korea, AD 668. Kim Beob-min (Hwang Jung-min) is the king of the small southern Korean state of Shilla and makes a deal with China's Tang dynasty officials to have a combined strike against the larger northern Korean state of Goguryeo. The conditions of the agreement involve Shilla being given back the Korean state of Baekje. The combined troops march to Pyongyang Castle, where Goguryeo's Yeon Gaesomun (Lee Won-jong) dies and hands over command of the army to his second son Yeon Nam-geon (Ryu Seung-ryong). This action upsets his first son, Yeon Namsaeng (Yoon Je-moon) who is not as war-hungry as Nam-geon. The Goguryeo soldiers defending the castle succeed in fighting off the Allied Army's first assault by catapulting honey and bees onto the Shilla soldiers. Meanwhile, the Shilla grand general Kim Yushin (Jung Jin-young) holds back sending his main force to join the advance Allied Army, preferring to deal directly with Yeon Gaesomun's sons than the Chinese. Yeon Namsaeng is expelled from the castle by his elder brother. The Chinese commander Yi launches a full-scale attack on the castle but is beaten back by the Goguryeo secret weapon. An allied soldier, Thingamajig (Lee Moon-sik) from Baekje, is captured. Thingamajig, who has suffered under Chinese rule, broadcasts a demoralizing message to the Allied Army. Thingamajig is rewarded by being allowed to marry the brave Goguryeo female warrior, Gap-sun (Sunwoo Sun), against her will. Cast Jung Jin-young Lee Moon-sik as Geoshigi Ryu Seung-ryong Yoon Je-moon Lee Kwang-soo Lee Won-jong Sunwoo Sun Kang Ha-neul Production Battlefield Heroes is a sequel to Once Upon a Time in a Battlefield set eight years after the first film. The film was inspired by the political situation in Korea in 1995. Lee Joon-ik stated he wanted that both Once Upon