Whakaotihia te rerenga e whai ake nei: I te timatanga o te Pakanga Tuatahi o te Ao, ka noho a Kirchheim hei rangatira kamupene i te Hanoverian Jäger Battalion No. 10. I uru ia ki tana peihana ki nga pakanga i te Hauauru o te Hauauru, i reira i whakatairangahia ai ia ki te rangatira i te Akuhata 24, 1914. I taua rangi ano i werohia a Kirchheim i te kaki i a ia e ngana ana ki te tango i tetahi papahiko Ingarihi i Fontaine aux Pierre ki te rawhiti o Cambrai. Whai muri i tana whakaoranga, ka tukuna ia me tana roopu ki te Alpine Corps hou i te marama o Mei 1915 ka tukuna ki a raatau i Tyrol, Austria-Hungary e whawhai ana i te
Ko te Pakanga Tuatahi o te Isonzo. I tae atu te Archduke Karl ki te roopu i te Pipiri 27 ka hoatu ki a ia te tohu Edelweiss, i mau tonu tae noa ki te mutunga o te pakanga ki a Shako me te potae. Ka whakawhiti atu tana ope ki te Hauauru ki te Hauauru i te timatanga o te tau 1916, ka uru ki te Pakanga o Verdun i whara ai a Kirchheim ka tukuna ki te hohipera o Charleville. I te Akuhata 15 i tohua a Kirchheim hei rangatira o te roopu. I te Akuhata 25, 1918, i arahi a Kirchheim i tana roopu ki te whakaeke i te Kemmel i te wa i whara ai ia i te upoko o te pu. Mo tana mahi nui i te whakaekenga o Kirchheim i tukuna i te Mei 12 mo te Pour le Mérite, engari kaore i riro mai. I roto i te pakanga tiaki i waenga i te Somme me Oise, i wehewehea ano a Kirchheim me tana ope taua i roto i te huarahi i whakaarohia ai ia mo te wa tuarua e tana rangatira rangatira mo te tohu. I te Oketopa 13, 1918, i tukuna e Kaiser Wilhelm II he ota a te kaunihera ki te whakawhiwhi i te Pour le Mérite ki te rangatira tika. I nga wiki whakamutunga o te pakanga, i whakahoutia ano a Kirchheim me tana ope, i tenei wa i kite ratou i nga mahi i nga Balkans. Whai muri i te whawhai ki Serbia me Maketonia, ka hoki mai ratou ki Tiamana ma Hungary me nga awa o Danube me Sava.