Chug, at the beginning Commandos were formed at Churchill's insistence in carrying the war to the Germans. The Navy didn't want to provide boats, the RAF aircraft, the Army didn't like irregular forces and the RM because they were in their surf. They had to appeal to Churchill.
Their first successful raid was the Lofotens which forced Hitler to reinforce Norway. It wasn't mentioned in this programme but there were still 40,000 Germans in northern Norway on VE Day.