After the United States entered World War I, Miner established the Committee on Protective Work for Girls (CPWG) to address the problem of prostitution and venereal disease around military training camps. The Chamberlain–Kahn Act, passed in 1918, addressed the same problem, but with more repressive results. Under this law, women suspected to be prostitutes could be detained, inspected, and sent to a rehabilitation center if they were suspected of having a venereal disease. Eventually the interest in policing military camps increased, and the CPWG was placed under the War Department's Division of Law Enforcement. Miner resigned as director of the committee, and in a private letter she stated that the War Department was placing the well-being of soldiers over that of the women.
