A month later, things had changed. The enemy were engaged by the UN forces at the Battle of Unsan in late October, which demonstrated the presence of Chinese soldiers in Korea and rendered significant losses to the American and other UN troops. Nevertheless, Willoughby downplayed the evidence about Chinese intervention in the war. He estimated that up to 71,000 Chinese soldiers were in the country, while the true number was closer to 300,000. He was not alone in this miscalculation. On 24 November, the Central Intelligence Agency reported to Truman that while there could be as many as 200,000 Chinese troops in Korea, "there is no evidence that the Chinese Communists plan major offensive operations".