Whakaotihia te rerenga e whai ake nei: I te Pakanga Tuatahi o Silesian, i wehewehe a Gessler i a ia i Mollwitz me Chotusitz, i reira i arahi ai ia i te hoia eke hoiho o te parirau maui o Wilhelm Dietrich von Buddenbrock. Whai muri i te pakanga, i whakatairangahia a Gessler ki te "Generalleutnant" ka whakawhiwhia ki te Order of the Black Eagle. I te Pakanga o Hohenfriedberg, ko tana eke me te Bayreuth Dragoon Regiment, i mau ai i nga haki 67, i noho ko tetahi o nga whakaeke tino rongonui o te hoia hoia o Prussia. I te
Te Pakanga o Kesselsdorf i te 15 o Tihema 1745, i arahina e Gessler te hoia eke hoiho o te parirau matau.