Question: What participant in Operation Phantom Linebacker currently has about 17,000 soldiers, 10,000 of whom are stationed in South Korea? 
Context: Yong Ju Gol (also spelled Yongjugol, Yongju-gol, and Yongju-Gol) is a red-light district in Paju, Gyeonggi Province, South Korea.  Yong Ju Gol began as a village that came into being during the Korean War to service members of the United States Army stationed at a nearby military camp whose spending was the sole source of revenue for the village.  The military camp, Camp Ross, was just south of Yong Ju Gol and separated the village from Seoul.  Once the post-war repatriation of prisoners concluded and until 1955, the 24th Military Police Company (seemingly the divisional MP company of the 24th Infantry Division) worked with other United Nations Command military police in Yong Ju Gol to keep law and order in the area.  In 1966, a museum dedicated to the 2nd Infantry Division was opened near Yong Ju Gol, having been relocated there from Fort Benning, Georgia, but the museum was moved to Camp Casey five years later.  In 1980, American soldier Freddie Grant attacked another American soldier with a straight razor outside a Yong Ju Gol nightclub and was subsequently imprisoned in the United States Disciplinary Barracks.  Although it is illegal to engage in prostitution in South Korea, women continue to engage in sex work in Yong Ju Gol through massage parlors, karaoke bars, and kissing rooms.  In 2006, South Korea's Minister of Gender Equality and Family, Jang Ha-jin, called Yong Ju Gol "the heart of prostitution" in Korea.  A popular "manhwa" called "Yongjugol Blues" glamorizes the prostitution in the area. Operation Phantom Linebacker was a coalition military operation in Iraq designed to interdict anti-government fighters from entering Iraq from Syria.  The U.S. 3rd Brigade and the 2nd Infantry Division (United States) conducted the operation with the Iraqi National Guard, Iraqi Border Police, and other Multinational Forces.  The U.S. III Corps uses ‘Phantom’ as its nickname.  Launched in early August 2004. Operation Moolah was a United States Air Force (USAF) effort during the Korean War to obtain through defection a fully capable Soviet MiG-15 jet fighter.  Communist forces introduced the MiG-15 to Korea on November 1, 1950.  USAF pilots reported that the performance of the MiG-15 was superior to all United Nations (U.N.) aircraft, including the USAF's newest plane, the F-86 Sabre.  The operation focused on influencing Communist pilots to defect to South Korea with a MiG for a financial reward.  The success of the operation is disputable since no Communist pilot defected before the armistice was signed on July 27, 1953.  However, on September 21, 1953, North Korean pilot Lieutenant No Kum-Sok flew his MiG-15 to the Kimpo Air Base, South Korea, unaware of Operation Moolah. Canada–South Korea relations are foreign relations between Canada and the Republic of Korea.  Canadian soldiers participated in the defense of South Korea during the Korean War.  Full diplomatic relations between Canada and South Korea were established on January 14, 1963.  Canada has an embassy in Seoul, and a consulate in Busan.  South Korea has an embassy in Ottawa and three Consulates-General, in Montreal, Toronto and Vancouver.  Both nations are full members of APEC, OECD and the G20. Blade of the Phantom Master (新暗行御史 , "Shin Angyō Onshi" , 신암행어사 "Shin amhaengosa") , translated as "New Royal Secret Commissioner", is a serial manhwa and anime film created by Youn In-wan and illustrated by Yang Kyung-il.  The series takes place in a world reminiscent of ancient Korea, and follows the Korean-folktale-inspired adventures of Munsu, one of the few remaining guardians against corruption and tyranny, as he seeks to find those responsible for the destruction of his country.  It was serialized from 2001 to 2007 in South Korea (as "Shin amhaengosa") and in Japan (as "Shin Angyō Onshi"), and was adapted into an animated theatrical-release film in 2004 in a first-of-its-kind collaboration between Japan and South Korea.  In 2007, an English-language version of the film was released in the United States by ADV Films (licensed for $130,000) under the title "Blade of the Phantom Master."  In 2008, the anime became one of over 30 ADV titles transferred to Funimation. The 2nd Infantry Division ("Indianhead"; "2ID," "2nd ID", or "Second D") is a formation of the United States Army.  Its current primary mission is the defense of South Korea in the initial stages of an invasion from North Korea until other American units can arrive.  There are approximately 17,000 soldiers in the 2nd Infantry Division, with 10,000 of them stationed in South Korea, accounting for about 35% of the United States Forces Korea personnel. Seoul Olympic Park Tennis Center is a tennis venue in Seoul, South Korea, located in the Olympic Park.  It hosted the tennis events for the 1988 Summer Olympics and has hosted several South Korea Davis Cup team and South Korea Fed Cup team ties.  The center currently hosts the Hansol Korea Open Tennis Championships.  The main stadium has a capacity of 10,000 people.  The No.1 court has a capacity of 3,500, and the other 12 courts have a capacity of 900. This list of tallest buildings in South Korea ranks skyscrapers in South Korea by height.  The tallest building in South Korea is currently the 123–story Lotte World Tower, which rises 555 m and was completed in 22nd December 2016.  It is also the world's 5th tallest building.  There are currently three buildings over 300m under construction in South Korea.  The three-building complex Haeundae LCT The Sharp in also under construction in Busan, and will reach 412 m .  There are various other projects planned over 300 meters, including the 338 m tall Parc1, scheduled to resume construction in 2016, the 510 m tall Busan Lotte Tower currently on hold, as well as the 553 m tall Hyundai Global Business Center slated for completion in 2021. Operation Agatha (Saturday, June 29, 1946) sometimes called Black Sabbath ("השבת השחורה") or Black Saturday because it began on the Jewish sabbath, was a police and military operation conducted by the British authorities in Mandatory Palestine.  Soldiers and police searched for arms and made arrests in Jerusalem, Tel Aviv, and Haifa, and in several dozen settlements; the Jewish Agency was raided.  The total number of British security forces involved is variously reported as 10,000, 17,000, and 25,000.  About 2,700 individuals were arrested, among them future Israeli Prime Minister Moshe Sharett.  The officially given purpose of the operation was to end "the state of anarchy" then existing in Palestine.  Other objectives included obtaining documentary proof of Jewish Agency approval of sabotage operations by the Palmach and of an alliance between the Haganah and the more violent Lehi (Stern Gang) and Irgun, to destroy the Haganah's military power, to boost army morale and to prevent a coup d'état being mounted by the Lehi and Irgun. The North Korean special operation force (NKSOF), officially the Korean People's Army Special Operation Force, consists of specially equipped and trained elite military units trained to perform military, political, or psychological operations for North Korea.  The units are active in testing the defenses of South Korea and have been detected operating in or around South Korea many times in the decades since the end of the Korean War.  There are about 180,000 special operational forces soldiers.
Answer: 2nd Infantry Division (United States)