Borne Vauthier Demarcation Stone

Western Front demarcation stones, also known as Bornes du Front and Bornes Vauthier, are monuments erected in France and Belgium to mark the limit of the German advance during the First World War. The stones were the idea of sculptor Paul Moreau-Vauthier, a veteran of the war, and were erected between 1921 and 1930. The total number of stones erected is unclear but it is thought that there were 118 official stones, of which 93 survive. The stones identify the army that held that sector in 1918 and are engraved with the text "Here the invader was brought to a standstill 1918" in English, Dutch, and French.

Source: Wikipedia