Sorry if this is old news, but I find this a very intersting archive:
http://www.oldphoto.info/
("This homepage is specialised on collection of authentic unpublished military & civilian pictures and postcards. You can find here facts about Austro-Hungarian imperial army, Czechoslovak legion during Great War and facts about Czechoslovak army between years 1918-1945.
In the year 2008 these pages become a part of Czech cultural heritage. With the cooperation with National Library of the Czech Republic the content is archived several times a year and will stay the same, even if the pages operation would be finished. The pages rank among The Czech national Bibliography as an integral part of National Library catalogue.")
There are many more gallieries, including Animals, Engineers, Cavalry etc., some of them (like MG troops and Stormtroops) won't work with my browsers. Regards, Pat