Upon the liberation of the Philippines by combined Filipino and American forces in 1945, the DI was not immediately reorganized since most of its original members were seconded in the service of the United States Army Counterintelligence Corps (CIC). After the surrender of Japan in August 1945, the DI was reactivated and the original members were called back to the service. The reactivated DI started with no records or equipment, most of which had been systematically destroyed by DI personnel for security reasons in order to prevent classified documents and equipment from falling into the hands of the Japanese.