On 29 June 1941 the Platinum Fox phase of Silver Fox was launched. Mountain Corps Norway under the command of "Generalleutnant" Eduard Dietl, consisting of the German 2nd Mountain Division and German 3rd Mountain Division together with the Finnish "Ivalo" Border Guard Battalion crossed the border and advanced on Murmansk. They were opposed by units of the Soviet 14th Army, namely the 14th and 52nd Rifle Division, which were commanded by Valerian A. Frolov. After some initial successes the advance was slowed. The German offensive met with many problems from the start, as the rough terrain with bad roads made any advance difficult. The German units also lacked proper maps and had to move mostly through unknown terrain.