paragraph_text: The Lahti L-35 is a semi-automatic pistol designed by Aimo Lahti that was produced between 1935 and 1952. Designed to be manufactured autonomously in Finland, the pistol was used by Finland throughout the Winter War and Continuation War. Considered to be of high quality, the Lahti was well manufactured and worked reliably in cold conditions or when fouled. The use of a bolt accelerator, an uncommon feature in a pistol, helped make the Lahti reliable.

paragraph_text: SS "Lane Victory" is an American Victory-class cargo ship used in World War II, the Korean War and Vietnam War. The ship was preserved in 1989 to serve as a museum ship in the San Pedro area of Los Angeles, California. As a rare surviving Victory ship, she was designated a U.S. National Historic Landmark.

paragraph_text: After World War II the PTRD was also used extensively by North Korean and Chinese armed forces in the Korean War. During this war, William Brophy, an American Army Ordnance officer, mounted a .50 BMG barrel to a captured PTRD to examine the effectiveness of long-range shooting. Furthermore, Americans also captured certain number of PTRD from Viet Cong in Vietnam War. The weapon proved effective out to 2,000 yards.

paragraph_text: Taegukgi: The Brotherhood of War (; "Taegukgi Hwinallimyeo") is a 2004 South Korean wartime action drama film directed by Kang Je-gyu. It stars Jang Dong-gun and Won Bin and tells the story of two brothers who are forcibly drafted into the South Korean army at the outbreak of the Korean War.

paragraph_text: The first battle the Americans entered in the Korean War was the Battle of Osan, where about four hundred strong landed in Pusan airport on the first of July. The American troops were sent off to Taejon the next morning where Major General John H. Church the head of U.S. field headquarters was confident in the US troop's strengths to push back the North Koreans. On July fifth the troops were finally put to the test when North Korean tanks crept towards Osan. The four hundred infantryman of the U.S. also called Task Force Smith opened fire on the North Koreans at 8: 16 am. Only four of the North Korean tanks were destroyed and twenty - nine kept moving forward breaking the US line. At the end of the battle only two more North Korean Tanks and two regiments of North Korean infantry were destroyed. The US had lost the battle, revealing that the mere sight of US troops would not reverse the military balance in Korea. By early August, the North Korean troops had pushed back the US and South Korean troops all the way to Naktong River, which is located about thirty miles from Pusan. The two weeks of fighting following this resulted in the most casualties of US troops than any other equivalent period of this war. However, during this time the US pushed supplies and personnel to Korea and by the end of July South Koreans and US troops outnumbered the North Koreans, although the North had pushed back the US and South by an amazing amount the North had suffered over fifty thousand casualties. Also because North Koreas supply lines were so lengthy and with the US in control of the water and air replenishing there losses were slow.

paragraph_text: The KP-SAM Shin-Gung or Shin-Kung (Korean: hangul: 신궁, hanja: 新弓) is a South Korean shoulder-launched surface-to-air missile manufactured by LIG Nex1. It is marketed internationally as the Chiron.

paragraph_text: The Kia Mohave, marketed in North America and China as the Kia Borrego, is a sport-utility vehicle (SUV) manufactured by the South Korea manufacturer Kia Motors. The vehicle debuted in 2008 in the Korean and US markets. The Kia Borrego is named after the Anza-Borrego Desert State Park in California; Borrego means "bighorned sheep" which can be found in the state park.

paragraph_text: The resultant South Korean government promulgated a national political constitution on 17 July 1948, and elected Syngman Rhee as President on 20 July 1948. The Republic of Korea (South Korea) was established on 15 August 1948. In the Russian Korean Zone of Occupation, the Soviet Union established a Communist North Korean government led by Kim Il-sung. President Rhee's régime excluded communists and leftists from southern politics. Disenfranchised, they headed for the hills, to prepare for guerrilla war against the US-sponsored ROK Government.

paragraph_text: The Renault Samsung SM7 is an executive car or full-size car (E-segment in Europe) produced by the Korean manufacturer Renault Samsung Motors since 2004.

paragraph_text: George Hoben Estabrooks (December 16, 1895 – December 30, 1973) was a Canadian-American psychologist and an authority on hypnosis during World War Two. He was a Harvard University graduate, a Rhodes Scholar, and chairman of the Department of Psychology at Colgate University. He used hypnosis to help spies have split personalities to not actually know they were spies in case of capture. He stated it was easy to create and easy to cure using hypnosis.

paragraph_text: The M-1978 Koksan is a 170 mm self-propelled gun of North Korean design and manufacture. Very little information is available due to the secretive nature of the North Korean government. The designations "M-1978" and "Koksan" were given to the type by American military analysts, as they first became aware of it in that year in Koksan, North Korea.

paragraph_text: Nambugun: North Korean Partisan in South Korea is a 1990 South Korean war drama film directed by Chung Ji-young. It is based upon the experiences of Lee Tae, a war correspondent during the Korean War.

paragraph_text: Nikolai Vasilyevich Sutyagin (; 5 May 1923 – 12 November 1986) was a Soviet fighter pilot in the Second World War and the Korean War. He considered by most Russian sources to be the top ace of the Korean War, with 22 victories.

paragraph_text: On June 25, 1950, North Korea invaded South Korea, sparking the Korean War, the Cold War's first major conflict, which continued until 1953. At the time, the Soviet Union had boycotted the United Nations (UN), thus forfeiting their veto rights. This allowed the UN to intervene in a civil war when it became apparent that the superior North Korean forces would unify the entire country. The Soviet Union and China backed North Korea, with the later participation of millions of Chinese troops. After an ebb and flow that saw both sides almost pushed to the brink of extinction, and massive losses among Korean civilians in both the north and the south, the war eventually reached a stalemate. The 1953 armistice, never signed by South Korea, split the peninsula along the demilitarized zone near the original demarcation line. No peace treaty was ever signed, resulting in the two countries remaining technically at war. Over 1.2 million people died during the Korean War.

paragraph_text: Chae commanded "Skeleton Corps", guerrilla corps during the Korean War, and became the authority on guerrilla tactics of the South Korean Army.

paragraph_text: The war started badly for the US and UN. North Korean forces struck massively in the summer of 1950 and nearly drove the outnumbered US and ROK defenders into the sea. However the United Nations intervened, naming Douglas MacArthur commander of its forces, and UN-US-ROK forces held a perimeter around Pusan, gaining time for reinforcement. MacArthur, in a bold but risky move, ordered an amphibious invasion well behind the front lines at Inchon, cutting off and routing the North Koreans and quickly crossing the 38th Parallel into North Korea. As UN forces continued to advance toward the Yalu River on the border with Communist China, the Chinese crossed the Yalu River in October and launched a series of surprise attacks that sent the UN forces reeling back across the 38th Parallel. Truman originally wanted a Rollback strategy to unify Korea; after the Chinese successes he settled for a Containment policy to split the country. MacArthur argued for rollback but was fired by President Harry Truman after disputes over the conduct of the war. Peace negotiations dragged on for two years until President Dwight D. Eisenhower threatened China with nuclear weapons; an armistice was quickly reached with the two Koreas remaining divided at the 38th parallel. North and South Korea are still today in a state of war, having never signed a peace treaty, and American forces remain stationed in South Korea as part of American foreign policy.

paragraph_text: In response to North Korea's invasion into South Korea the United Nations convened to formulate a response. The U.N. demanded North Korea's immediate withdrawal and, when this was not met, United States Army General Douglas MacArthur was appointed supreme commander of U.N. forces. To halt the rapid progress of North Korean forces into the south Task Force Smith was deployed to the Korean front from Japan. Task Force Smith consisted of U.S. Army officers and regiments of the Army's 24th Infantry Division that were stationed in Japan as occupational forces. Unfortunately the 24th were under trained, poorly supplied, and outnumbered. The 24th offered very little resistance against the North Korean advance. American and South Korean troops were pushed south and in late July 1950 Task Force Smith was overrun in the city of Taejon. Troops from the Army's 25th Infantry Division were deployed to Taejon to establish a new line and pullout the decimated 24th I.D. This addition of combat troops did not stop the North Korean advance and both American and South Korean troops were pushed further south.

paragraph_text: During the Korean War, General Song Shilun commanded the PLA 9th Army Group. His armies fought against the US Army 31st Regimental Combat Team and the 1st Marine Division at the Chosin Reservoir in November–December 1950.

paragraph_text: In China, the war is officially called the "War to Resist U.S. Aggression and Aid Korea" (simplified Chinese: 抗美援朝战争; traditional Chinese: 抗美援朝戰爭; pinyin: Kàngměiyuáncháo zhànzhēng), although the term "Chaoxian (Korean) War" (simplified Chinese: 朝鲜战争; traditional Chinese: 朝鮮戰爭; pinyin: Cháoxiǎn zhànzhēng) is also used in unofficial contexts, along with the term "Korean Conflict" (simplified Chinese: 韩战; traditional Chinese: 韓戰; pinyin: Hán Zhàn) more commonly used in regions such as Hong Kong and Macau.

paragraph_text: The subsequent Korean War, which lasted from 1950 to 1953, ended with a stalemate and has left the two Koreas separated by the Korean Demilitarized Zone (DMZ) up to the present day.

Question: When did the country that manufactures the Koksan gun split from the country the U.S. helped in the Korean War?
Answer: 1953