Hi, I'm after a historical map of Northern France for a project (my first attempt at a turn based wargame). I guess this is the right forum to ask in ... Does anyone know of a free to use set of maps that might be suitable (physical characteristics if possible). There are numerous ones on Google but they're all 'situation maps' rather than a plain one without markup that I'm after. Thanks in advance.

Try the library of congress historical maps, they have several high-resolution maps available for download (in .sid and jpeg2000 format, so get something like Irfanview to view them)