War

World War I

The World War I Document Archive
Resource for primary documents; international in scope.

World War II

WWII Veterans Site
Non-profit site with resources for WWII Veterans.

Nuremberg War Crimes Trials
Complete 22 volumes digitized by the Avalon Project at Yale Law School.

World War II Poster Database
Northwestern University Library's searchable database of over 400 posters.

Korean War

Korean War Project
Search lists of casualties, discuss POWs and MIAs in forums, and view unit histories.

The Korean War and Its Origins, 1945-1953
The Harry S. Truman Library and Museum provides a collection of related documents available in PDF.

Vietnam Conflict

History of Vietnam and the Vietnam War
From Vets With a Mission.

State-Level Casualty Lists, 1956-2006
Prepared by the National Archives and Records Administration, lists include the Korean and Vietnam Wars.

Vietnam Center and Archive
Resources on the Vietnam conflict at Texas Tech University.

Gulf War/Desert Storm

Operation Desert Storm
From the National Security Archives at the George Washington University.

ALIC Military Resources: Gulf War/Desert Storm
From the National Archives, Archives Library Information Center (ALIC).

War in Afghanistan

ALIC Military Resources: Afghanistan
From the National Archives, Archives Library Information Center (ALIC).

War in Iraq

ALIC Military Resources: Iraq
From the National Archives, Archives Library Information Center (ALIC).

Library of Congress Iraq War 2003 Web Archive