The term D.C. Agents refers to three different law enforcement agencies in the United States: FEDS, GMEN, and TMEN. FEDS stands for Federal Bureau of Investigation (FBI), which is a federal law enforcement agency that investigates crimes related to national security. GMEN stands for Government Men, which is a term used to refer to agents of the United States Secret Service, a federal law enforcement agency responsible for protecting the President of the United States and other high-ranking government officials. Finally, TMEN stands for Treasury Men, which is a term used to refer to agents of the United States Treasury Department, a federal agency responsible for managing the nation's finances.