▁of ▁the ▁war . ▁C ras emann ▁returned ▁to ▁his ▁original ▁regiment ▁and ▁became ▁a ▁batt alion ▁commander . ▁He ▁applied ▁to ▁serve ▁with ▁the ▁newly ▁formed ▁Reichs wehr ▁( Im per ial ▁Def ence ) ▁but ▁was ▁decl ined ▁and ▁subsequently ▁left ▁the ▁military ▁in ▁April ▁ 1 9 1 9 . ▁ ▁Inter war ▁period ▁After ▁several ▁years ▁of ▁civil ian ▁life , ▁C ras emann ▁returned ▁to ▁service ▁with ▁the ▁He er ▁( Ar my ) ▁branch ▁of ▁the ▁We hr macht ▁( Def ence ▁Force ) ▁in ▁ 1 9 3 6 ▁and ▁was ▁posted ▁to ▁the ▁operations ▁branch ▁of ▁the ▁Ober k omm ando ▁des ▁He eres ▁( High ▁Command ▁of ▁the ▁Army ), ▁known ▁as ▁OK H . ▁He ▁was ▁promoted ▁to ▁major ▁that ▁June ▁and ▁the ▁following ▁year ▁was ▁transferred ▁to ▁the ▁man eu vers ▁and ▁oper ational ▁planning ▁branch ▁of ▁the ▁OK H . ▁In ▁November ▁ 1 9 3 8 ▁he ▁was ▁posted ▁to ▁II . ▁Battalion ▁of ▁the ▁ 2 0 th ▁Art illery ▁Regiment , ▁where ▁he ▁spent ▁six ▁months ▁on ▁staff ▁before ▁taking ▁up ▁a ▁battery ▁command ▁with ▁the ▁ 7 3 rd ▁Art illery ▁Regiment , ▁ 1 st ▁Pan zer ▁Division . ▁This ▁gave ▁him ▁vital ▁experience ▁in ▁leading ▁motor ised ▁form ations , ▁particularly ▁when ▁supporting ▁t anks . ▁ ▁World ▁War ▁II ▁During ▁the ▁invasion ▁of ▁Poland , ▁C ras emann ▁led ▁his ▁battery ▁as ▁the ▁ 1 st ▁Pan zer ▁Division ▁advanced ▁on ▁and ▁into ▁Wars