Interesting archive, although I've not registered and so remain unsure as to whether it's a subscription service. It's available in both German and English. Be aware as with a lot of searches best results come from double searching, eg: in German and English, and also some of the photos are wrongly dated, and some are dated only by year. ullstein bild eta: Also searches available in French. Lo-res images may be downloaded free of charge. Hi-res image files may be downloaded for €5.00 (plus VAT) per image.
You're welcome, like I suggested at be a bit wary of searching by date, although it will turn up tons of photos it will miss some, I found one Caen '44 picture dated as 1.1.1900.