for those of you interested in the World Wars (at least the 1st, I haven't checked it fully out yet)- McMaster's collection of trench maps from the First World War is being put to work more than 90 years after the end of hostilities.  http://www.physorg.com/news168191775.html   The Peace and War in the 20th Century web site can be accessed any time at pw20c.mcmaster.ca .