The design of "Sturm Teague" originated from1No.562 equipment-self-attack mortar 606/4 put forward by Hitler himself on August 5, 943, and it was selected as the navy's 380mm anti-submarine mortar gun (rocket boost) early in the morning. In order to be prudent, guderian suggested to try out a prototype car for feasibility assessment, but Hitler verbally agreed, but still set the monthly output as 10. 1October 20th, 1943, 10, a 380mm self-propelled mortar iron model based on the chassis of Tiger Type I tank was unveiled at the Alaes training ground. Hitler was very satisfied after reading it. After careful calculation, on April 1944 and April 19, he ordered to immediately prepare the 12 war room with guns, and once the Tiger I returned to the factory for repair, it began to be modified. The factory worked hard and only produced seven guns. The progress was delayed until September 15, and 1 the car was barely completed. Then at the speed of 1 car every day, seven finished products were finally submitted on September 2 1 day. Hitler was eager to get it into war at once, so he specially approved the supply of 300 shells a month.