The National Union Government was a form of national government that governed the Grand Duchy of Luxembourg between 24 February 1916 and 19 June 1917, at the height of the First World War. At the time, Luxembourg was occupied by the German Empire, but the occupying Germans had promised not to interfere in the country's political machinations, provided that the Luxembourgish government did not aid Germany's enemies. Nonetheless, political life was dominated by the crisis that had enveloped Europe.