This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
WWI German targets in England zoomed. en Major German bombing targets in England both from air and sea during the First World War See also File WWI German targets in England Derivative work of File Europe outline map file in the public domain own additions based on map digitised by IMeowbot Maps of the history of the United Kingdom