Nahbollenbach Storage Depot, 1945 (Source: U.S. Strategic Bombing Survey) Map created by a field team attached to the 9th Air Force during a visit to the depot in 1945. Purpose of the visit was to assess the damage resulting from a March 3 1945 bombing mission on this target. Building 2 would later be used as an office building by US forces once they occupied the depot in the early 1950s.