Public domain
Fort Sill, Oklahoma, 1943. 155 mm. howitzer. The 155 mm. howitzer, firing on the Fort Sill, Oklahoma artillery range, provides a mass of heavy, high-angle firepower
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineFort Sill, Oklahoma, 1943. 155 mm. howitzer. The 155 mm. howitzer, firing on the Fort Sill, Oklahoma artillery range, provides a mass of heavy, high-angle firepower. 1943-01-01. United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.