High Quality Content by WIKIPEDIA articles! The German occupation of Luxembourg in World War II was a period in the history of Luxembourg during which the country was occupied by Nazi Germany. It was a thorough test of the young nation's will and it strengthened national symbols such as the monarchy and the Luxemburgish language. The attack on the small neutral country was part of the Westfeldzug in which Luxembourg and Belgium were used as transit territories to attack France by outflanking the Maginot Line. Plans for the attack had been prepared by 9 October 1939, but execution was postponed several times. On 10 May 1940, the German Wehrmacht invaded Luxembourg, Belgium and the Netherlands