Northern Limit Line () is a 2015 South Korean naval thriller film written and directed by Kim Hak-soon, based on the real-life events of the Second Battle of Yeonpyeong.
 It stars Kim Mu-yeol, Jin Goo, and Lee Hyun-woo.
The Battle of Daecheong was a skirmish between the South Korean and North Korean navies near the Northern Limit Line (NLL) on 10 November 2009 off Daecheong Island.
 A patrol boat from the northern Democratic People's Republic of Korea (DPRK) was seriously damaged while the navy of the southern Republic of Korea (ROK) sustained no casualties.
Kim Tae-kyun (born June 17, 1960) is a South Korean film director.
 Kim wrote and directed "Volcano High" (2001) and "Temptation of Wolves" (2004).
 He also directed "The Adventures of Mrs. Park" (1996), "First Kiss" (1998), "A Millionaire's First Love", "Crossing" (2008), "Higanjima" (2010), "A Barefoot Dream" (2010), "Innocent Thing" (2014), and "Bad Sister" (2014).
 "Crossing" and "A Barefoot Dream" were selected as the South Korean entries for Best Foreign Language Film at the 81st and 83rd Academy Awards, but both did not make the final shortlist.
The Second Battle of Yeonpyeong (Korean: 제2 연평해전, "Je I(2) Yeonpyeong Haejeon") was a confrontation at sea between North Korean and South Korean patrol boats along a disputed maritime boundary near Yeonpyeong Island in the Yellow Sea in 2002.
 This followed a similar confrontation in 1999.
 Two North Korean patrol boats crossed the contested border and engaged two South Korean Chamsuri-class patrol boats.
 The North Koreans withdrew before South Korean reinforcements arrived.
Baengnyeong Island (sometimes spelled Baekryeong; ] ) is a 45.8 km2 , 8.45 km long and 12.56 km wide island in Ongjin County, Incheon, South Korea, located near the Northern Limit Line.
 The 1953 Korean Armistice Agreement which ended the Korean War specified that the five islands including Baengnyeong Island would remain under United Nations Command and South Korean control.
 This agreement was signed by both the DPRK and the United Nations Command.
 Since then, it serves as a maritime demarcation between North and South Korea in the Yellow Sea.
 It has a population of approximately 4,329.
Kim Young-tak (born 1976) is a South Korean film director and screenwriter.
 Kim wrote and directed the comedy film "Hello Ghost" (2010).
 The comedy was a local hit - the 9th highest grossing Korean film in 2010, and won him the Best New Director (Film) at the 47th Baeksang Arts Awards in 2011.
Five West Sea Islands (Korean: 西海五島/서해오도) refers to the five islands in the West Sea (Yellow Sea) administrated by Incheon, South Korea.
 They are Yeonpyeong Island, Baengnyeongdo, Daecheongdo, Socheongdo and U Island.
 Their positions are much closer to North Korea and their sovereignties are claimed by North Korea, but they are controlled by South Korea since the United Nations forces established the Northern Limit Line (NLL) above the islands in 1953 after the Korean War.
Kim Hak-soon (born 1954) is a South Korean film director and screenwriter.
 Kim wrote and directed the naval thriller film "Northern Limit Line" (2015) which depicts a real-life naval skirmish with North Korea in June 2002.
 It drew more than 6 million viewers 29 days after its release on June 24, 2015, making it one of the top-grossing film in 2015.
The Admiral: Roaring Currents (), or simply The Admiral, is a 2014 South Korean naval war film directed and co-written by Kim Han-min.
 Based on the historical Battle of Myeongnyang, it stars an ensemble cast led by Choi Min-sik as the Korean naval commander Yi Sun-sin.
 The film was released theatrically in South Korea on July 30, 2014.
The Northern Limit Line or North Limit Line (NLL)-북방한계선(in ROK)- is a disputed maritime demarcation line in the Yellow (West) Sea between the Democratic People's Republic of Korea (DPRK) on the north, and the Republic of Korea (ROK) on the south.
 This line of military control acts as the "de facto" maritime boundary between North and South Korea.

Question: Kim Hak-soon (born 1954) is a South Korean film director and screenwriter, Kim wrote and directed which naval thriller film, Northern Limit Line, a  South Korean naval thriller film written and directed by Kim Hak-soon, based on the real-life events of the Second Battle of Yeonpyeong, released in what year?
Answer: 2015