- The Department of Defense Manpower Data Center (DMDC): The DMDC provides a variety of resources for finding information about military members, including the Military Casualty Information System (MCIS) and the Defense Casualty Analysis System (DCAS).
- The National Archives and Records Administration (NARA): NARA is the official repository for federal government records, including military records. You can search NARA's online catalog to find military records, such as service records, discharge papers, and pension files.
- Fold3: Fold3 is a subscription-based website that provides access to a wide range of military records, including unit histories, muster rolls, and photographs. However, Fold3 does offer some free content, such as the Civil War Soldiers and Sailors System and the World War I Draft Registration Cards.
- Ancestry: Ancestry is a subscription-based website that provides access to a wide range of historical records, including military records. However, Ancestry does offer some free content, such as the U.S. Federal Census and the U.S. Social Security Death Index.
- FamilySearch: FamilySearch is a free website that provides access to a wide range of genealogical records, including military records. However, FamilySearch does not have a dedicated section for military records, so you will need to use the site's search engine to find the records you are looking for.