In the 1930s the State Security had its hands full on left-wing and right-wing extremism, and a surge in German espionage activity. The German threat caused the Belgian government to reinstate the military intelligence service in 1937. As war became imminent the two services were briefly brought together under the same ministry. After the German invasion, Belgian intelligence followed the government in exile to London to undertake, once again, the coordination of the resistance. This was impeded by the rift between the government and King Leopold III, who had decided to stay in Belgium and thus fall into the hands of the Nazis. The government, unwilling to trust the military intelligence service because of their loyalty to their commander-in-chief made prisoner of war, favoured the State Security. This greatly exacerbated the rivalry between the two services. Their constant squabbling got so bad the government eventually appointed a High Commissioner to coordinate both services.