Question: Why did the author of With the Century redeploy his military troops?

full_context: Document 1: With the Century: Reminiscences: With the Century () is the autobiography of Kim Il-sung, founder and president of North Korea. The memoirs, written in 1992 and published in eight volumes, retell Kim's life story through his childhood to the time of Korean resistance. Initially, a total of 30 volumes were planned but Kim Il-sung died in 1994 after just six volumes; the seventh and eight volumes were published posthumously. The work reveals early influences of religious and literary ideas on Kim's thinking. An important part of North Korean literature, "With the Century" is held as a valuable if somewhat unreliable insight into the nation's modern history under late colonial Korea. The book is considered one of a few North Korean primary sources widely available in the West and as notable research material for North Korean studies.
Document 2: Korean War: Chinese troops suffered from deficient military equipment, serious logistical problems, overextended communication and supply lines, and the constant threat of UN bombers. All of these factors generally led to a rate of Chinese casualties that was far greater than the casualties suffered by UN troops. The situation became so serious that, on November 1951, Zhou Enlai called a conference in Shenyang to discuss the PVA's logistical problems. At the meeting it was decided to accelerate the construction of railways and airfields in the area, to increase the number of trucks available to the army, and to improve air defense by any means possible. These commitments did little to directly address the problems confronting PVA troops.
Document 3: Chinese characters: After Kim Jong Il, the second ruler of North Korea, died in December 2011, Kim Jong Un stepped up and began mandating the use of Hanja as a source of definition for the Korean language. Currently, it is said that North Korea teaches around 3,000 Hanja characters to North Korean students, and in some cases, the characters appear within advertisements and newspapers. However, it is also said that the authorities implore students not to use the characters in public. Due to North Korea's strict isolationism, accurate reports about hanja use in North Korea are hard to obtain.
Document 4: The Aquariums of Pyongyang: The Aquariums of Pyongyang, by Kang Chol-hwan and Pierre Rigoulot, is an account of the imprisonment of Kang Chol-Hwan and his family in the Yodok concentration camp in North Korea.
Document 5: Korean War: On 18 September, Stalin dispatched General H. M. Zakharov to Korea to advise Kim Il-sung to halt his offensive around the Pusan perimeter and to redeploy his forces to defend Seoul. Chinese commanders were not briefed on North Korean troop numbers or operational plans. As the overall commander of Chinese forces, Zhou Enlai suggested that the North Koreans should attempt to eliminate the enemy forces at Inchon only if they had reserves of at least 100,000 men; otherwise, he advised the North Koreans to withdraw their forces north.
Document 6: Korean War: Soviet generals with extensive combat experience from the Second World War were sent to North Korea as the Soviet Advisory Group. These generals completed the plans for the attack by May. The original plans called for a skirmish to be initiated in the Ongjin Peninsula on the west coast of Korea. The North Koreans would then launch a "counterattack" that would capture Seoul and encircle and destroy the South Korean army. The final stage would involve destroying South Korean government remnants, capturing the rest of South Korea, including the ports.
Document 7: Kim Jong-un: Scarce information on Kim Jong - un's early life comes from North Korean defectors and people who have claimed to witness him abroad, such as during his school attendance in Switzerland. Some of the information has been conflicting and contradictory, perhaps confusing him with his brother, Kim Jong - chul, who also attended school in Switzerland around the same time. Nevertheless, there has been some consensus on information about his early life. North Korean authorities have stated that his birthdate is 8 January 1982, but South Korean intelligence officials believe the actual date is a year later. Former basketball star Dennis Rodman said that the birthdate is 8 January 1983 after meeting Kim in September 2013 in North Korea. Kim Jong - Un was the second of three children Ko Yong - hui bore to Kim Jong - il; his elder brother Kim Jong - chul was born in 1981, while his younger sister, Kim Yo - jong, is believed to have been born in 1987.
Document 8: Korean War: On the night of 10 August in Washington, American Colonels Dean Rusk and Charles H. Bonesteel III were tasked with dividing the Korean Peninsula into Soviet and U.S. occupation zones and proposed the 38th parallel. This was incorporated into America's General Order No. 1 which responded to the Japanese surrender on 15 August. Explaining the choice of the 38th parallel, Rusk observed, "even though it was further north than could be realistically reached by U.S. forces, in the event of Soviet disagreement...we felt it important to include the capital of Korea in the area of responsibility of American troops". He noted that he was "faced with the scarcity of US forces immediately available, and time and space factors, which would make it difficult to reach very far north, before Soviet troops could enter the area". As Rusk's comments indicate, the Americans doubted whether the Soviet government would agree to this. Stalin, however, maintained his wartime policy of co-operation, and on 16 August the Red Army halted at the 38th parallel for three weeks to await the arrival of U.S. forces in the south.
Document 9: Korean War: In April 1950, Stalin gave Kim permission to invade the South under the condition that Mao would agree to send reinforcements if they became needed. Stalin made it clear that Soviet forces would not openly engage in combat, to avoid a direct war with the Americans. Kim met with Mao in May 1950. Mao was concerned that the Americans would intervene but agreed to support the North Korean invasion. China desperately needed the economic and military aid promised by the Soviets. At that time, the Chinese were in the process of demobilizing half of the PLA's 5.6 million soldiers. However, Mao sent more ethnic Korean PLA veterans to Korea and promised to move an army closer to the Korean border. Once Mao's commitment was secured, preparations for war accelerated.
Document 10: Kim Il-sung Square: Kim Il-sung Square is a large city square in the Central District of Pyongyang, North Korea, and is named after the country's founding leader, Kim Il-sung. The square was constructed in 1954 according to a master plan for reconstructing the capital after the destruction of the Korean War. It was opened in August 1954. The square is located on the foot of the Namsan Hill, west bank of the Taedong River, directly opposite the "Juche" Tower on the other side of the river. It is the 37th largest square in the world, having an area of about 75,000 square metres (807,293 square feet) which can accommodate a rally of more than 100,000 people. The square has a great cultural significance, as it is a common gathering place for rallies, dances and military parades and is often featured in media concerning North Korea.
Document 11: Korean War: On 30 September, Zhou Enlai warned the United States that China was prepared to intervene in Korea if the United States crossed the 38th parallel. Zhou attempted to advise North Korean commanders on how to conduct a general withdrawal by using the same tactics which had allowed Chinese communist forces to successfully escape Chiang Kai-shek's Encirclement Campaigns in the 1930s, but by some accounts North Korean commanders did not utilize these tactics effectively. Historian Bruce Cumings argues, however, the KPA's rapid withdrawal was strategic, with troops melting into the mountains from where they could launch guerrilla raids on the UN forces spread out on the coasts.
Document 12: Korean War: In a series of emergency meetings that lasted from 2–5 October, Chinese leaders debated whether to send Chinese troops into Korea. There was considerable resistance among many leaders, including senior military leaders, to confronting the U.S. in Korea. Mao strongly supported intervention, and Zhou was one of the few Chinese leaders who firmly supported him. After Lin Biao politely refused Mao's offer to command Chinese forces in Korea (citing his upcoming medical treatment), Mao decided that Peng Dehuai would be the commander of the Chinese forces in Korea after Peng agreed to support Mao's position. Mao then asked Peng to speak in favor of intervention to the rest of the Chinese leaders. After Peng made the case that if U.S. troops conquered Korea and reached the Yalu they might cross it and invade China the Politburo agreed to intervene in Korea. Later, the Chinese claimed that US bombers had violated PRC national airspace on three separate occasions and attacked Chinese targets before China intervened. On 8 October 1950, Mao Zedong redesignated the PLA North East Frontier Force as the Chinese People's Volunteer Army (PVA).
Document 13: Kim Jong-il: Soviet records show that Kim was born Yuri Irsenovich Kim () in 1941 in the village of Vyatskoye, near Khabarovsk, where his father, Kim Il-sung, commanded the 1st Battalion of the Soviet 88th Brigade, made up of Chinese and Korean exiles. Kim Jong-il's mother, Kim Jong-suk, was Kim Il-sung's first wife. Inside his family, he was nicknamed "Yura", while his younger brother Kim Man-il (born Alexander Irsenovich Kim) was nicknamed "Shura".
Document 14: Korean War: Although Kim's early successes had led him to predict that he would end the war by the end of August, Chinese leaders were more pessimistic. To counter a possible U.S. deployment, Zhou Enlai secured a Soviet commitment to have the Soviet Union support Chinese forces with air cover, and deployed 260,000 soldiers along the Korean border, under the command of Gao Gang. Zhou commanded Chai Chengwen to conduct a topographical survey of Korea, and directed Lei Yingfu, Zhou's military advisor in Korea, to analyze the military situation in Korea. Lei concluded that MacArthur would most likely attempt a landing at Incheon. After conferring with Mao that this would be MacArthur's most likely strategy, Zhou briefed Soviet and North Korean advisers of Lei's findings, and issued orders to Chinese army commanders deployed on the Korean border to prepare for American naval activity in the Korea Strait.
Document 15: Hyon Chol-hae: During the Korean War, Hyon served as Kim Il-sung's bodyguard, a role which gave him "a place in North Korea's revolutionary history". He was director of the General Logistics Department of the Korean People's Army from 1986 to 1995, when he was appointed deputy director of the General Political Department, becoming one of the senior most members of the North Korean military and political leadership. He has been described as being in "close proximity" to Kim Jong-il, and as reporting directly to him. It had been suggested that, following Kim Jong-il's death, he may have taken part in a military council leadership of the country. He was transferred to director of the Standing Bureau of the National Defence Commission. He has been a member of the Central Committee of the Workers' Party of Korea since 1991.
ground_truth: to defend Seoul
sub_queries: With the Century >> author Answer: Kim Il-sung
Why did Kim Il-sung redeploy his military troops? Answer: to defend Seoul