Battle of the Bulge
American soldiers of the 290th Regiment fight in the snow near Amonines, Belgium. The Battle of the Bulge, also known as, "Hitler's 'Last Gamble'", was the last German counter-offensive of the World War II. The battle took place during winter in the Belgium, Luxembourg, and Germany, in an area called the Ardennes.
To find out more about the Battle of the Bulge check out these links:
https://www.loc.gov/collections/world-war-ii-maps-military-situation-map...
https://encyclopedia.ushmm.org/content/en/article/battle-of-the-bulge
U.S. Departement of Defense. American infantrymen of the 290th Regiment fight in fresh snowfall near Amonines, Belgium. 1945. Negative. National Archives Catalog. https://catalog.archives.gov/id/531239 (Accessed December 14, 2014).
Public Domain
Public Domain is a copyright term that is often used when talking about copyright for creative works. Under U.S. copyright law, individual items that are in the public domain are items that are no longer protected by copyright law. This means that you do not need to request permission to re-use, re-publish or even change a copy of the item. Items enter the public domain under U.S. copyright law for a number of reasons: the original copyright may have expired; the item was created by the U.S. Federal Government or other governmental entity that views the things it creates as in the public domain; the work was never protected by copyright for some other reason related to how it was produced (for example, it was a speech that wasn't written down or recorded); or the work doesn't have enough originality to make it eligible for copyright protection.