 If the Germans attacked they would have to be arrested and confined into safe places.The list also mentioned Germans or other foreigners of whom it was not certain if they sympathised with the Nazis, despite the fact that many of them were Jewish refugees.On 10 May 1940, the Germans having invaded Belgium, telegrams were sent to local police authorities, signed "de Foy" (it is still disputed if he actually sent them) to set in motion the arrests and the deportations to France.