Later that day several German stations posed as Radio Luxembourg by broadcasting in the Luxembourgish wavelength, making, in the opinion of United States Chargé d'Affaires George Platt Waller, "grossly unneutral announcements".[4] German military manoeuvres and river traffic made the population increasingly nervous, so in the spring of 1940 fortifications were erected along the borders with Germany and France.[6] Since the Corps des Gendarmes et Volontaires had no pioneer unit, construction fell to the responsibility of civilian engineers, while technical advice was sought from the French, who took great interest in the line's establishment.During World War I, her elder sister and then-Grand Duchess Marie-Adélaïde had elected to stay during Germany's occupation of the country, bringing the monarchy into disrepute; Charlotte wanted to avoid such problems.The government moved some of the country's gold reserves to Belgium, and began stockpiling funds in its Brussels and Paris legations in the event it was forced to flee due to German attack.The Paris legation was also given a sealed envelope detailing a formal request of military assistance from the French government in case communications were cut-off in an invasion.[10] Meanwhile, Captain Archen had received his subordinate's report, but by that point, he had been told by informants in the Gendarmerie that shots had been exchanged with German operatives at a remote farm near the Moselle.Two Luxembourgish customs officials at Wormeldange heard horses and soldiers across the Moselle, but were unable to make out the Germans' activities due to heavy fog.[14] At around midnight, Captain Stein, Minister of Justice Victor Bodson, and Police Commissioner Joseph Michel Weis held an emergency meeting.[10] The steel doors of the Schuster Line were ordered closed on 10 May 1940 at 03:15, following reports of movement of German troops on the east side of the border rivers Our, Sauer, and Moselle.[12] Fire was exchanged, but the Germans did not encounter any significant resistance except for some bridges destroyed and some land mines since the majority of the Luxembourgish Volunteer Corps stayed in their barracks.[15] Telephone and radio messages from the border posts to the Gendarmerie and Volunteer Corps headquarters informed the Luxembourgish government and Grand Ducal court of the invasion.[11] In Esch a group of 125 German special operations troops had landed by Fieseler Storch, with orders to hold the area until the main invasion force arrived.Belgian Ambassador Kervyn de Meerendré was also stopped by German soldiers at the border and ordered to turn back,[22] as was the Luxembourgish Minister of Education, Nicolas Margue, who had attempted to escape by taxi.Accompanied by her husband, Prince Felix, her mother, Dowager Grand Duchess Marie Anne, and members of the Grand-Ducal suite, she departed for the border village of Redange.[24] At 08:00, elements of the French 3rd Light Cavalry Division under General Petiet, supported by the 1st Spahi Brigade under Colonel Jouffault and the 2nd company of the 5th Armoured Battalion, crossed the southern border to conduct a probe of German forces; these units later retreated behind the Maginot Line.By the end of May, Wehrer and several high ranking functionaries established a provisional "Administrative Commission" to govern Luxembourg in lieu of the Grand Ducal family and the other ministers.