Tight rules shaped the first major Commando raid

The force first refuelled from a tanker in the British-occupied Faroe Islands, showing that independence at the target still rested on secure staging and fuel support. The planners then had to destroy a key occupied-Norwegian industry without killing civilians, provoking reprisals, or alienating the government in exile. Claymore's rules of engagement therefore placed unusually modern-looking limits on damage to civilian people and infrastructure. The first major Commando raid also dispersed small groups across several islands instead of concentrating them at one beach. In a pre-helicopter force, those groups could not rapidly reinforce one another, so each depended on destroyer gunfire if unexpected resistance developed.