The Night and Fog Decree, issued by Hitler in 1941 and disseminated along with a directive from Keitel, was operated within the conquered territories in the West (Belgium, France, Luxembourg, Norway, Denmark and the Netherlands). The decree allowed those "endangering German security" to be seized and made to disappear without trace. Keitel's directive stated that "efficient intimidation can only be achieved either by capital punishment or by measures by which the relatives of the criminal and the population do not know his fate."