Development The idea for a heavy infantry support vehicle capable of demolishing heavily defended buildings or fortified areas with a single shot came out of the experiences of the heavy urban fighting in the Battle of Stalingrad in 1942. At the time, the Wehrmacht had only the Sturm-Infanteriegeschütz 33B available for destroying buildings, a Sturmgeschütz III variant armed with a 15 cm sIG 33 heavy infantry gun. Twelve of them were lost in the fighting at Stalingrad. Its successor, the Sturmpanzer IV/Brummbär was in production from early 1943, but the Wehrmacht still saw a need for a similar, but heavier armoured and armed vehicle. Therefore a decision was made to create a new vehicle based on the Tiger tank and arm it with a 210 mm howitzer. However, this weapon turned out not to be available at the time and was therefore replaced by a 380 mm rocket launcher, which was adapted from a Kriegsmarine depth charge launcher. In September 1943 plans were made for Krupp to fabricate new Tiger I armored hulls for the Sturmtiger. The Tiger I hulls were to be sent to Henschel for chassis assembly and then to Alkett where the superstructures would be mounted. The first prototype was ready and presented to Adolf Hitler in October 1943. Delivery of the first hulls would occur in December 1943, with the first three Sturmtigers completed by Alkett by 20 February 1944. Due to delays, Hitler did not request production of the weapon until 19 April 1944; 12 superstructures and weapons for the Sturmtiger would be prepared and mounted on rebuilt Tiger I chassis. The first three production series Sturmtigers were completed by Alkett in August 1944. Plans to complete an additional seven 38 cm Sturmtigers from 15 to 21 September 1944 were presented to Hitler in a conference on 18–20 August 1944. Ten Sturmtigers were produced in September, along with an additional five in December 1944.[2] Hitler had laid great importance on the special employment of the Sturmtiger and believed it would be necessary to produce at least 300 rounds of ammunition per month.[2

johnbr, Dec 6, 2012
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