 Complete the following phrase:  At the outbreak of World War I, Huyghé served in the Belgian Army during the German invasion of Belgium, fighting at the Battles of Liège, Antwerp and the Yser in 1914. In 1915, with the front stabilised at the Yser, Huyghé returned to the Belgian Congo to serve in the Force Publique in the East African Campaign. He initially served under Colonel Molitor in the North Brigade Brigade Nord during the operations on the frontier of German Ruanda-Urundi and fought at the 