The four appeared before U.S. Magistrate G. Mallon Faircloth on Monday. They are identified as Michael Walli, 61, of Duluth, Minn.; the Rev. Luis Vitale, 77, of Oakland, Calif.; Nancy Gwin, 63, of Syracuse, N.Y., and Kenneth Hayes, 60, of Austin, Texas.
All four protesters face charges of entering a military, naval or Coast Guard property, which merits up to six months in prison on conviction.
The Columbus Ledger-Enquirer reports that Mr. Walli told Judge Faircloth he preferred to remain in jail until his January trial date. His request was denied.
The protesters gather each year to demonstrate against the Western Hemisphere Institute for Security Cooperation, which trains Latin American soldiers.