Government information sources on national security, foreign affairs, and the military

United States Department of Defense -- includes a long list of links to DOD websites, including the Encyclopedia of Ethical Failure

Homeland Security Digital Library

Library of Congress Country Studies

United States Department of State

National Defence and the Canadian Armed Forces

Ministry of Defence (UK)

Foreign Relations of the United States (FRUS) series -- U.S. Department of State, Office of the Historian