Perry Biddiscombe has offered a somewhat different view. In his books "Werwolf!: The History of the National Socialist Guerrilla Movement, 1944–1946" (1998) and "The Last Nazis: SS Werwolf Guerrilla Resistance in Europe, 1944–1947" (2000), Biddiscombe asserts that after retreating to the Black Forest and the Harz mountains, the Werwolf continued resisting the occupation until at least 1947, possibly until 1949–50. However, he characterizes German post-surrender resistance as "minor", and calls the post-war Werwolfs "desperadoes" and "fanatics living in forest huts". He further cites U.S. Army intelligence reports that characterized Nazi partisans as "nomad bands" and judged them as less serious threats than attacks by foreign slave laborers and considered their sabotage and subversive activities to be insignificant. He also notes that: "The Americans and British concluded, even in the summer of 1945, that, as a nationwide network, the original Werwolf was irrevocably destroyed, and that it no longer posed a threat to the occupation."