The Lines of Torres Vedras
Map showing the Lines of Torres Vedras, the famous fortifications built to defend Lisbon in 1809-1810. The individual forts are shown as gray dots, with the sections of scarped hillside as gray lines.
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How to cite this article:
Rickard, J (17 April 2008), The Lines of Torres Vedras, http://www.historyofwar.org/Maps/maps_torres_vedras.html