map

Two maps of Bastogne from wikipedia (out of copyright, public domain):

http://upload.wikimedia.org/wikipedia/commons/c/ce/Bastogne%2C_Belgium_Map.png
http://upload.wikimedia.org/wikipedia/commons/c/cc/Fifth_Panzer_Armee_Attacks_28th_Infantry_Division.png

and one more (out of copyright, public domain by law):
http://www.ibiblio.org/hyperwar/USA/USA-E-Ardennes/maps/USA-E-Ardennes-VI.jpg