The archive is international in focus and presents primary documents and links concerning World War I. Collection material includes conventions, treaties and official papers; Memorial & personal reminiscences; biographical dictionary; WWI Image archive; Special Topics and commentary articles.
What did you do in the War, Grandma?
World War II: A Resource Guide (Library of Congress)
The Avalon Project: Documents in Law, History and Diplomacy: World War II: Documents
History: Military: Primary Sources -- WWII (University of Washington Libraries)
Online Oral Histories of the Manhattan Project
This website captures the stories of Manhattan Project veterans and their families. The Manhattan Project was a great human collaboration. Participants included recent immigrants who fled anti-Semitism in Europe, young men and women straight from high school or college, and numerous Hispanics, Native Americans, and African-Americans. Some 125,000 people worked in secret locations in communities developed by the government for the sole purpose of the project. Most surprisingly, very few knew that they were working on an atomic bomb.