The Soviet breakthrough in Belorussia and Karelian Offensive forced the Army Group North to withdraw a large portion of their troops from Narva to the central part of the Eastern Front and to Finland. As there were insufficient forces for the defence of the former front line at Narva in July, the German army detachment began preparations for withdrawal to the Tannenberg defence line in the Sinimäed Hills 16 kilometres from Narva. The commanders of the Leningrad Front were unaware of the preparations; they designed a new Narva Offensive. Shock troops from the Finnish front were concentrated near the town, giving the Leningrad Front a 4:1 superiority both in manpower and equipment. Before the German forces had implemented their plan, the Soviet 8th Army launched their offensive; the Battle of Auvere was the result. The I.Battalion, 1st Estonian and the 44th Infantry Regiment repulsed the attack, inflicting heavy losses on the 8th Army. The "Nordland" and "Nederland" detachments in Ivangorod left their positions quietly during the night before 25 July. The evacuation was carried out according to the German plans until the 2nd Shock Army resumed the offensive in the morning. Supported by 280,000 shells and grenades from 1360 assault guns, the army crossed the river north of the town. The II.Battalion, 1st Estonian Regiment kept the Soviet shock Army from capturing the highway behind the retreating troops. The defensive operation led to the destruction of the SS Volunteer Panzergrenadier Regiment 48 "General Seyffardt" due to tactical errors. The Soviet forces captured Narva on 26 July.