World War II: Thirty members of the Luxembourgish resistance defend the town of Vianden against a larger Waffen-SS attack in the Battle of Vianden.

The German occupation of Luxembourg in World War II began in May 1940 after the Grand Duchy of Luxembourg was invaded by Nazi Germany. Although Luxembourg was officially neutral, it was situated at a strategic point at the end of the French Maginot Line. On 10 May 1940, the German Wehrmacht invaded Luxembourg, Belgium and the Netherlands. Luxembourg was initially placed under a military administration, but later became a civilly administrated territory and finally was annexed directly into Germany. The Germans believed Luxembourg to be a Germanic state, and attempted to suppress what they perceived as alien French language and cultural influences. Although some Luxembourgers joined the resistance or collaborated with the Germans, both constituted a minority of the population. As German nationals, from 1942, many Luxembourgers were conscripted into the German military. Nearly 3,500 Luxembourgish Jews were murdered during the Holocaust. The liberation of the country by the Allies began in September 1944, but due to the Ardennes Offensive it was not completed until early 1945.

Vianden is a commune with town status in the Éislek region, north-eastern Luxembourg, with a population of 2,203 as of 2023. It is part of the canton of the same name. Vianden lies on the Our river, near the border between Luxembourg and Germany. It is known for the Vianden Castle.

The Waffen-SS was the combat branch of the Nazi Party's paramilitary Schutzstaffel (SS) organisation. Its formations included men from Nazi Germany, along with volunteers and conscripts from both German-occupied Europe and unoccupied lands. With the start of World War II, tactical control was exercised by the Oberkommando der Wehrmacht, with some units being subordinated to the Kommandostab Reichsführer-SS directly under Reichsführer-SS Heinrich Himmler's control. It was disbanded in May 1945.