Yoon Suk Yeol and Kim Yong-hyun met and became friends in 1977, while they were both attending Chungam High School. Kim was one year Yoon's senior. However, the two didn't become close friends until decades later in 2020, when Yoon began living a life of exile after he was suspended from his
prosecutor general duties by Minister of Justice
Choo Mi-ae. Yoon called Kim over to have a drink, where the two had conversations about prominent political South Korean figures. This reportedly got Yoon interested in running for president. Kim also convinced Yoon to form a faction full of graduates from Chungam High School if he was elected, which resulted in the Chungam Faction later being formed. After Yoon was elected president, Chungam High School's website nicknamed Yoon "The Son of Chungam." Outside of Yoon and Kim, known members of the Chungam Faction include: Since the other members of the faction graduated years apart from both Yoon and Kim, they did not know them personally. It is alleged that Yoon met them sometime during his presidential campaign. It has also been speculated that
Chief of Staff of the Army Park An-su may have had activities within the faction, despite him graduating from , rather than Chungam High School. In December 2022, Yeo In-hyung was appointed as the Joint Chiefs of Staff's Chief Directorate of Operations. In November 2023, numerous military generals within the faction were appointed to
lieutenant general, including Yeo In-hyung, Lee Jin-woo, and Kwak Jong-geun. Kwak had been denied the rank three times by previous administrations. Yeo was appointed as the Defense Counterintelligence Commander, Throughout 2023 and 2024, Yoon and Kim would hold private gatherings with the faction. Here, Yoon would conduct drinking sessions, as well as cook
Kimchi-jjigae and
Omelette as snacks. During these gatherings, they would have conversations related to the
National Assembly, the
Democratic Party, and the Army Special Warfare Command. After the April 2024 legislative election, in which the ruling
People Power Party suffered a landslide defeat against the
Democratic Party, Yoon began to mention the possibility of declaring martial law frequently. Such discussions were had in private meetings with members of the faction where Yoon, Kim Yong-hyun, and Yeo In-hyung were always present.
Conjecture questioning Kim at his Defense Minister confirmation hearing, 2 September 2024 Speculation of the faction's existence began in August 2024, after Yoon nominated Kim as the Minister of National Defense. Lawmakers speculated that Kim's appointment was a part of an upcoming martial law strategy to prevent First Lady
Kim Keon Hee from going to prison. During his confirmation hearing on 2 September 2024, Democratic Representative Park Sun-won would point out that along with Kim's appointment, several key military positions have been filled with figures who had personal connections to Yoon, all of whom graduated from the same alma mater, Chungam High School. Park would also point out that these figures were also being promoted to higher roles consistently. Park then suggested that these key military figures could play a critical role in imposing martial law in a contingency. Kim dismissed these speculations, stating; "Confirmation hearings are not a place for false propaganda based on misinformation." During the same hearing, Democratic Representative Choo Mi-ae would speculate that if confirmed, Kim might use his Defense Minister position to appoint his loyalists to key military roles. Choo would point out that Yeo In-hyung had received numerous promotions during Yoon's term, stating; "General Yeo In-hyung is being promoted too quickly. He will probably reach
full general rank by the end of Yoon Suk Yeol's term." Choo then asked Kim if Yeo's constant promotions were part of a strategy to center the military around Yoon's personal agenda, as she was aware that they both graduated from Chungam High School. Kim denied this claim. Kim took office as Minister of National Defense on 6 September. == Involvement in the 2024 martial law crisis ==