For the 75th anniversary of D-Day, the Library of Congress published a webpage titled Experiencing War. Researchers and anyone who is interested can access 12 collections with diaries, photos and oral histories of men and women who experienced that event.
The page can be accessed at this link: https://www.loc.gov/vets/stories/ex-war-dday75.html
The materials are part of one of the Library of Congress’ special projects: the Veterans History Project (VHP), part of the American Folklife Center, which collects personal accounts of American war veterans with the aim to preserve the memories of war and conflicts in which the United States took part, from the First World War up to the wars in Iraq and Afghanistan. The VHP’s materials provide a wealth of sources for researchers who work on experiences of war, and many of those can be accessed remotely through their website: https://www.loc.gov/vets/