The German Army soon discovered a need for
artillery support to keep up with fast moving armored
formations. Several designs using Panzer I, Panzer II
and Panzer III chassis were developed but the
chassis proved to be overloaded or crew protection
Alkett of Berlin came up with a solution by
mounting the s.IG 33 150mm howitzer on the
Pz 38(t) Auf H chassis powered by a 150 horse
power engine. They were referred to as the Grille
although some referred to them as Bison. Ninety
of these vehicles were built between February and
April 1943. These vehicles were used up to the
end of the war. They appeared on the Eastern,
Western and Italian fronts.
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