"As early as Jul 1940, Germany had her eyes on the nickel mines of Petsamo, a Finnish port very recently seceded to the Soviet Union as Finland lost the Winter War. During Blue Fox operations, German forces moved into Finland after negotiations that brought the ambitious Germany and the vengeful Finland together. The offensive struck Russia on 22 Jun 1941, the same day that Operation Barbarossa was launched to the south. The people of Finland often referred to this invasion as the beginning of the Continuation War between Finland and the Soviet Union.
Two German divisions struck from Norway and penetrated Petsamo which was already surrounded by Finnish troops. The port fell quickly from the shock of the surprise attack. The second phase of the attack was launched on 29 Jun 1941 as German and Finnish troops marched across the barren northern terrain. Exposed German vehicles in this coverless terrain became easy targets for Soviet air and artillery attacks, and logistics became so difficult that the attack virtually halted as they approached the port city of Murmansk.
The southern pincer in the attack was fought over entirely different terrain as the one in the north toward Murmansk. The southern offensive was also launched on 29 Jun with German troops marching through thick ancient forests. The advance through the roadless forest halted the southern offensive as the barren terrain had done to the northern pincer. The Soviet troops, enjoying a much shorter supply line, slowly gained dominance as skirmishes took place on the stagnant frontlines. German Lieutenant General Eduard Dietl, commanding officer of the offensive, declared the operation a failure on 22 Sep after seeing all his troops being tied down and his frontlines becoming defensive lines."