I am surprised that I had not mentioned this on TMP before.
As an early member of Flickr and a keen military historian I was responsible for setting up several interest groups in the military and WW2 areas. I still manage these today:
Tanks and Armoured Cars (not artillery) – 35,500 images:
link
Artillery – 25,200 images:
link
PANZER – 26,400 images:
flickr.com/groups/panzer
Military Trucks, Lorries and Soft Vehicles – 13,300 images:
link
Range targets and wrecks – 623 images:
link
Normandy 1944 – 880 images:
link
PANZER was a rival group but the founder dropped out and passed it to me which is why the two groups now share the same avatar. The content differs and some tanks appear in both groups, others do not. PANZER includes SP artillery, Tanks and Armoured Cars does not – they go to Artillery instead.
Range targets and wrecks is for anything shot up, burning or recovered from a range and now held in a museum or junk yard.
The last, Normandy 1944, is a passion project as my late father was in Normandy and he appears as the group's avatar.
Flickr is searchable by subject and, if the photographer has tagged correctly, by vehicle or location. It also shows up on Google.
Barry