LOC is a great resources for primary documents. We have linked to the collections pertaining to war and the military, but it contains an amazing collection of additional resources.

Since 2009, The Memory Project has provided veterans of various conflicts the opportunity to share their personal experiences through oral interviews. These stories and artefacts are available for use by teachers, students, and the general public.

The National Archives Catalog contains descriptions for NARA's nationwide holdings in the Washington, DC area; regional facilities; and Presidential Libraries. Military Records in particular can be sorted through by organization.

“Briefing Books” are one-stop resources covering a full range of topics in U.S. foreign policy. Containing from 5 to 100+ documents, each briefing book features an introductory essay, individual document descriptions, related photo or video content, plus links for further reading.

The First World War portal makes available invaluable primary sources for the study of the Great War, brought together in four thematic modules. From personal collections and rare printed material to military files, artwork and audio-visual files, content highlights the experiences of soldiers, civilians and governments on both sides of a conflict that shook the world.

The National World War I Museum and Memorial is America's leading institution dedicated to remembering, interpreting and understanding the Great War and its enduring impact on the global community. The site provides free curriculum materials for teaching about WWI.

World War I: timelines, biographies, photos, weapons, countries involved, assassinations and more.

This is just one of the digital collections that the New York Public Library has to offer. Check out the rest of their collection to find more.

The Jewish Virtual Library (JVL) is the most comprehensive online encyclopedia of Jewish history, politics and culture. With nearly 25,000 entries, the JVL is a one-stop shop for students of all ages interested in anything from anti-Semitism to Zionism.

A Google Arts & Culture collection featuring different stories, virtual museum exhibits, photos, and interviews from those who were affected and survived.

Contains maps, casualty files, as well as information about the different military units.

The Vietnam Center and Sam Johnson Vietnam Archive collects and preserves the documentary record of the Vietnam War, and supports and encourages research and education regarding all aspects of the American Vietnam Experience.