BEIRUT—Thousands of Kurdish-led forces, with assistance from the U.S.-led coalition, launched a military operation Sunday at a sprawling camp in northeast Syria, in a new effort to identify and arrest ISIS terrorists and tamp down escalating killings and violence in the camp. The security sweep at the al-Hol camp will continue over time and is being conducted with “indirect” intelligence, surveillance and reconnaissance support provided by the coalition, U.S. officials said Sunday. The Kurdish-led forces said they have nearly 5,000 fighters participating in the operation and on Sunday they arrested nine people, including an Iraqi ISIS member who worked in recruitment. The al-Hol camp houses some 62,000 people, including wives and children of ISIS members, and U.S. officials say it has become a breeding ground for the next generation of ISIS terrorists. There have been 47 killings in the camp since the start of 2021, according to the Kurdish-led forces, while U.S …