In May 1940 the Fort d'Andoy was commanded by Commandant Degehet. Following the opening of hostilities between Belgium and Germany, the fort fired on German aircraft without effect. German troops approached on the 13th, taking fire from the fort. Heavier forces, including armored vehicles, approached on the 14th. In the 15th the supporting infantry was ordered to retreat. That afternoon the Germans began to take control of Namur. The fort's air tower took fire from light artillery. Heavier combat took place the next day, and firing became general by the 16th. On the 18th Andoy fired in support of the
Fort de Marchovelette, but Marchevolette surrendered at 2000 hours. On the 21st the
Fort de Saint-Héribert and the
Fort de Malonne requested support. Andoy fired its 75mm guns on the distressed forts, but they were overrun. On the 22nd German forces began a sustained attack on Andoy, supported by
88mm high-velocity guns. The
Fort de Maizeret and the
Fort de Dave fired on Andoy in support of the defenders, successfully repelling the initial assault. Some of the observation positions were destroyed by German fire, but enough remained in operation to allow coordination with the neighboring forts. Maizeret and Andoy were attacked on the 23rd. Dave supported the two forts, who supported each other. The garrison noted that the fort's eclipsing turrets could not rise fast enough to avoid being hit by 37mm anti-tank guns before they could fire. The attack intensified so that the turrets and observation cupolas could not be occupied. Saint-Héribert, Maizeret and Malonne surrendered, and Andoy's armament was reduced to one 75mm gun and a grenade launcher turret. The Germans delivered an ultimatum under a
flag of truce, demanding the surrender of the fort and threatening aerial bombardment. Andoy's remaining weapons were sabotaged and the fort was surrendered by Commandant Degehet at 1730, receiving military honors from the Germans. The garrison was taken into custody and sent to
prisoner of war camps in East Prussia. There were a total of four Belgian dead at Andoy. More than 300 Germans had been killed or wounded in the actions of May around the fort. ==Present==