Local Veterans Organizations:
East Tennessee Military Affairs Council

Roll Call & Reveille (knoxnews.com blog by Senior Writer Fred Brown):
http://blogs.knoxnews.com/knx/fredbrown/

World War I:
First World War.Com, The War to End All Wars
The National World War I Museum
Experiencing War,  World War I: The Great War

World War II:
The National World War II Memorial

Korea:
Korean War Project
The Korean War
50th Anniversary of the Korean War Commemoration
Korean War Veterans Memorial (Washington, DC)

Vietnam:
American Experience: Vietnam Online
Battlefield: Vietnam
The Wars for Viet Nam: 1945 to 1975
Vietnam Veterans Memorial (Washington, DC)

General Interest:
The Price of Freedom: Americans at War
The National D-Day Memorial
The National D-Day Museum
Experiencing War: Stories from the Veterans History Project
Alabama Veterans Memorial Foundation
Museum of World War II (Natick, MA)
World War II Museum (Eldred, NY)
Patriots Point Naval & Maritime  Museum (Charleston, SC)
The MacArthur Memorial (Norfolk, VA)