The Home Guard had a number of secret roles. That included sabotage units who would disable factories and petrol installations following the invasion. Members with outdoor survival skills and experience (especially as gamekeepers or poachers) could be recruited into the Auxiliary Units, an extremely secretive force of more highly trained guerrilla units with the task of hiding behind enemy lines after an invasion, emerging to attack and destroy supply dumps, disabling tanks and trucks, assassinating collaborators, and killing sentries and senior German officers with sniper rifles. They would operate from pre-prepared secret underground bases, excavated at night with no official records, in woods, in caves, or otherwise concealed.
