Germany faced war on two fronts in WWI and attacked Belgium as part of its plan to quickly defeat France by using 90% of its troops on the Western Front. This plan was unsuccessful, and by September 1914 Germany had retreated and dug deep trenches, leading to a brutal three-year stalemate war of trench warfare with new weapons such as long-range cannons, machine guns, chemical weapons, tanks, airplanes, and zeppelins.
![[object Object],Germany attacks Belgium](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)