I think they did, but I know for sure they armed the Dept. of Education (gotta hunt down those student loan delinquents) and the Sosh Security Admin (just bought about 200K rounds of select handgun ammo). After all, those senior citizens get mighty uppity when the check is late.
Agencies in bold text are LEAs (Law Enforcement Agencies)
Department of Agriculture (USDA) Office of Inspector General (USDAOIG) United States Forest Service (USFS) U.S. Forest Service Law Enforcement and Investigations (USFSLEI) Department of Commerce (DOC) Bureau of Industry and Security (BIS) Office of Export Enforcement (OEE) National Institute of Standards and Technology (NIST) National Institute of Standards and Technology Police (NIST Police) National Oceanic and Atmospheric Administration (NOAA) National Marine Fisheries Service (NMFS) National Oceanic and Atmospheric Administration Fisheries Office for Law Enforcement (OLE) Department of Commerce Office of Security (DOCOS) Department of Commerce Office of Inspector General (DOCOIG) Department of Defense Office of Inspector General (DODOIG) Defense Criminal Investigative Service (DCIS) Pentagon Force Protection Agency (PFPA) United States Pentagon Police (USPPD) Department of Defense Police Defense Logistics Agency Police (DLA) National Security Agency Police (NSA) Defense Intelligence Agency Police (DIA) National Geospatial-Intelligence Agency Police (NGA) Special Inspector General for Afghanistan Reconstruction (SIGAR) Special Inspector General for Iraq Reconstruction (SIGIR) Department of the Army Counterintelligence activity (CI), United States Army Intelligence and Security Command United States Army Criminal Investigation Command (CID) United States Army Military Police Corps Department of the Army Police United States Army Corrections Command Department of the Navy Naval Criminal Investigative Service (NCIS) United States Marine Corps Criminal Investigation Division (MC CID) Department of the Navy Police (civilian police) Marine Corps Provost Marshal's Office (military police) United States Marine Corps Police (civilian police) United States Naval Academy Police (civilian police) Master-at-Arms (U.S. Navy military police) Department of the Air Force Air Force Office of Special Investigations (AFOSI) Air Force Security Forces Center (AFSFC) Department of the Air Force Police Department of Education Office of the Inspector General (EDOIG) Department of Energy (DOE) Office of Inspector General (DOEOIG) Office of Health, Safety and Security (DOEHSS) Office of Secure Transportation (OST) Department of Health and Human Services United States Food and Drug and Administration (HHSFDA) Office of Criminal Investigations (OCI) National Institutes of Health (NIH) National Institutes of Health Police (NIH Police) Office of Inspector General (HHSOIG) Department of Homeland Security (DHS) CBP Officers and Border Patrol Agents at a ceremony in 2007 Federal Law Enforcement Training Center (FLETC) United States Citizenship and Immigration Services (USCIS) United States Coast Guard (USCG) Coast Guard Investigative Service (CGIS) United States Customs and Border Protection (CBP) Office of Air and Marine (OAM) Office of Border Patrol (OBP) Office of Field Operations (OFO) Federal Protective Service (FPS) United States Immigration and Customs Enforcement (ICE) Enforcement Removal Operations (ERO) Homeland Security Investigations (HSI) Office of Intelligence Office of Professional Responsibility (OPR) United States Secret Service (USSS) Transportation Security Administration (TSA) Office of Law Enforcement/Federal Air Marshal Service (FAMS) Department of Homeland Security Office of Inspector General (DHSOIG) Department of Housing and Urban Development Office of Inspector General (HUD/OIG)  Protective Service Division (HUDPSD) Department of the Interior (USDI) Bureau of Indian Affairs (BIA) Bureau of Indian Affairs Police (BIA Police) Bureau of Land Management (BLM) Bureau of Land Management Office of Law Enforcement (BLM Rangers and Special Agents) Bureau of Reclamation (BOR) Bureau of Reclamation Office of Law Enforcement (BOR Rangers) Hoover Dam Police aka Bureau of Reclamation Police National Park Service (NPS) Division of Law Enforcement, Security and Emergency Services (U.S. Park Rangers-Law Enforcement) United States Park Police Office of Inspector General (DOIOIG) Office of Surface Mining Reclamation and Enforcement (OSMRE) United States Fish and Wildlife Service (USFWS) Office of Law Enforcement Division of Refuge Law Enforcement Department of Justice (USDOJ) Alcohol and Tobacco Tax and Trade Bureau Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) United States Drug Enforcement Administration (DEA) (since 1973) Federal Bureau of Investigation (FBI) Federal Bureau of Investigation Police (FBI Police) Federal Bureau of Prisons (BOP) Office of Inspector General (DOJOIG) United States Marshals Service (USMS) Department of Labor Office of Inspector General (DOLOIG) Department of State (DoS) Bureau of Diplomatic Security (DS) U.S. Diplomatic Security Service (DSS) Office of Foreign Missions Office of the Inspector General of the Department of State Department of Transportation Federal Aviation Administration (FAA) Office of Inspector General (DOTOIG) United States Merchant Marine Academy Department of Public Safety (USMMADPS) Office of Odometer Fraud Investigation - NHTSA (OFI) Department of the Treasury A Bureau of Engraving and Printing Police (BEP) patrol car. Alcohol and Tobacco Tax and Trade Bureau Bureau of Engraving and Printing (BEP) Bureau of Engraving and Printing Police (BEP Police) Financial Crimes Enforcement Network (FINCEN) Internal Revenue Service Criminal Investigation Division (IRS-CI) Office of Inspector General (TREASOIG) Treasury Inspector General for Tax Administration (TIGTA) United States Mint Police (USMP) Special Inspector General for the Troubled Asset Relief Program (SIGTARP) Department of Veterans Affairs Office of Inspector General (VAOIG) Veterans Affairs Police
Library of Congress, Office of Security and Emergency Preparedness (LOC) Sergeant at Arms of the United States House of Representatives Sergeant at Arms of the United States Senate United States Capitol Police (USCP) United States Government Printing Office Police Office of Inspector General, United States Government Printing Office
Marshal of the United States Supreme Court United States Supreme Court Police Administrative Office of the United States Courts, Office of Probation and Pretrial Services (AOUSC)
Other federal law enforcement agencies
Independent Agencies and Quasi-official Corporations Central Intelligence Agency Security Protective Service (CIASPS) United States Environmental Protection Agency Criminal Investigation Division (EPACID) Office of Inspector General (EPAOIG) National Aeronautics and Space Administration Office of Inspector General (NASAOIG) NASA Security Services Nuclear Regulatory Commission, Office of Inspector General (NRCOIG) Office of Personnel Management, Office of Inspector General (OPMOIG) Railroad Retirement Board, Office of Inspector General (RRBOIG) Small Business Administration, Office of Inspector General (SBAOIG) Federal Deposit Insurance Corporation, Office of Inspector General (FDICOIG) General Services Administration, Office of Inspector General (GSAOIG) Social Security Administration Office of Inspector General (SSAOIG) United States Postal Service (USPS) USPS Office of Inspector General (USPSOIG) United States Postal Inspection Service (USPIS) U.S. Postal Police Smithsonian Institution Office of Protection Services (SI) National Zoological Park Police (NZPP) Office of the Inspector General (OIG) Amtrak Amtrak Office of Inspector General Amtrak Office of Security Strategy and Special Operations (OSSSO) Amtrak Police Federal Reserve Bank: Federal Reserve Police Tennessee Valley Authority Tennessee Valley Authority Office of Inspector General (TVAOIG) Tennessee Valley Authority Police (TVAP) United States Agency for International Development, Office of Inspector General (AIDOIG) Statistics"