Whakaotihia te rerenga e whai ake nei: Mai i te Hanuere 1798 ki te Poutu-te-rangi 1799, ko Zach te rangatira o te "Armee von Italien". I whakawhiwhia e ia te rangatira o nga kaimahi mai i te Hurae 1799 ki te Pipiri 1800. I te 9 o Hune 1799 i whakawhiwhia ia ki te General-major. I roto i tētahi reta tūmataiti ki te karere o Rūhia i whakatuwheratia e te kāwanatanga o Ahitereiria, i whakaahuatia e te rangatira ope Alexander Suvorov a Zach hei "pupuhi, whai whakaaro me te ngaio, engari he kaiwhakangungu nui o te "Unterkunft" (taonga) i te wa e hiahia ana ahau ki te pupuhi ki te mahi ahi". Ahakoa i whakamahia e Suvorov te "Unterkunft" hei whakahawea, i whakahawea a Zach i te whakaatu i te reta. He pai te mahi a Zach i te
Te Pakanga o Novi i te 15 o Akuhata. Mo ana mahi, i whakawhiwhia e te emepara mauruuru ki a ia te ripeka Knight o te Order Military o Maria Theresa i te 13 Oketopa 1799. He tohunga pāngarau mohio, he pai ake a Zach ki te mara o te pūkaha hōia i a ia i te rangatira whawhai, i te tūranga whakahaere rānei.