Historical treasures hidden for decades have been uncovered in the crypts of a cathedral, with items including burial crowns ...

The Their Finest Hour project by the University of Oxford has seen volunteers photographing and archiving the items which are free to view online. Among them is a top-secret D-Day map, a souvenir ...

Krzysztof Mindur planned to explore the forest in Zarszyn in hopes of finding items from World War I or ... He plans to continue searching former WWII battlefields next year.

This makes it very difficult to establish what proportion of overall ordnance comes from WW2. Other discovered items could be more recent and originate from training exercises, for example.