After German troops marched into Belgium in 1914, the Belgian army retreated behind the Yzer River and opened the sluices at Nieuwpoort. As a result, the water gushes into the Yzer valley up to the railway embankment, which serves as a flood barrier.
Villa Bertha
The German advance was stopped thanks to the artificial inundation of the Yzer. Meanwhile, the Belgian troops built a tangle of trenches, observation towers and bunkers along the railway line, including Villa Bertha, a Belgian machine gun post just behind the railway embankment, and a Red Cross post.