Inundation of the Wieringermeer
On 17 April 1945, the retreating German occupying forces inundated the polder of Wieringermeer, the Netherlands. == Preparations == In 1945 German forces occupying the Netherlands planned to destroy the Zuiderzee Works to cover their retreat.
Source: Wikipedia — Inundation of the Wieringermeer (CC BY-SA 4.0)