 By 1944 , the Free Belgian forces in the United Kingdom numbered some 4 @,@ 500 men . Belgian soldiers formed the 1st Belgian Infantry Brigade ( which also included an artillery battery of soldiers from Luxembourg ) more often known as the Brigade Piron after its commanding officer , Jean @-@ Baptiste Piron . The Brigade Piron was involved in the Normandy Invasion and the battles in France and the Netherlands until liberation . 
