Group 1 - Over 300 South Korean employees of Korean companies in the U.S. were released after being detained for alleged "illegal residency," with only one choosing to remain in the U.S. [1][2] - The incident has caused shock, anger, and panic among the South Korean public, leading President Yoon Suk-yeol to suggest it may deter South Korean companies from investing in the U.S. [1][9] - The U.S. Immigration and Customs Enforcement (ICE) conducted a large-scale raid, marking the largest single-location operation in its nationwide crackdown on illegal immigration [6][9]. Group 2 - The South Korean government coordinated with the U.S. to ensure the detained citizens returned voluntarily rather than being deported, with assurances of fair treatment for future visits to the U.S. [3] - The operation targeted a battery factory collaboration between Hyundai Motor and LG Energy Solution, resulting in the detention of 475 workers, over 300 of whom were South Korean [3][9]. - Following the incident, there are reports of South Korean workers beginning to withdraw from LG's U.S. production facilities, and LG has requested subcontractors to prepare emergency plans [10].