"Sturmpanzer-Abteilung 219" was originally to be formed from "Sturmgeschütz-Brigade 914", but this was changed to "Sturmgeschütz-Brigade 237" in September 1944. In mid-September 1944, the brigade transferred to the Döllersheim Training Area to reorganize and re-equip. Only ten "Sturmpanzers" had been received when the battalion was alerted on 15 October to participate in "Unternehmen Eisenfaust", the German coup to forestall Hungary's attempt to surrender to the Allies. All the vehicles were given to the First Company and it departed for Budapest on the following day. Bomb damage to the rails delayed its arrival until 19 October, by which time it was no longer needed as a pro-German government had been installed. It was moved by rail to St. Martin, Slovakia for more training. The battalion was transferred to the vicinity of Stuhlweissenburg to relieve trapped German forces in Budapest. It remained in the vicinity of Budapest until forced to retreat by advancing Soviet forces.