▁to ▁World ▁War ▁I . ▁ ▁It ▁was ▁established ▁on ▁ 3 ▁October ▁ 1 8 1 5 ▁as ▁the ▁General ▁Command ▁in ▁the ▁Duch y ▁of ▁Sax ony ▁( Gener alk omm ando ▁im ▁Herzog t um ▁Sachsen ) ▁and ▁became ▁the ▁IV ▁Army ▁Corps ▁on ▁August ▁ 3 0 , ▁ 1 8 1 8 . ▁ ▁Its ▁headquarters ▁was ▁in ▁Mag de burg ▁and ▁its ▁catch ment ▁area ▁included ▁the ▁Pr uss ian ▁Province ▁of ▁Sax ony ▁and ▁the ▁adjacent ▁Sax on ▁Duch ies ▁( S ax e - Al ten burg , ▁An halt ) ▁and ▁Princi pal ities ▁( Sch war zburg - S onders hausen , ▁Schwar zburg - R ud ol stadt , ▁Re uss ▁E lder ▁Line ▁and ▁Re uss ▁Junior ▁Line ). ▁ ▁In ▁pe ac etime , ▁the ▁Corps ▁was ▁assigned ▁to ▁the ▁VI ▁Army ▁Ins pect or ate ▁but ▁joined ▁the ▁ 1 st ▁Army ▁at ▁the ▁start ▁of ▁the ▁First ▁World ▁War . ▁ ▁It ▁was ▁still ▁in ▁existence ▁at ▁the ▁end ▁of ▁the ▁war ▁in ▁the ▁ 6 th ▁Army , ▁He eres gruppe ▁K ron pr in z ▁Ru pp recht ▁on ▁the ▁Western ▁Front . ▁ ▁The ▁Corps ▁was ▁dis band ed ▁with ▁the ▁dem obil isation ▁of ▁the ▁German ▁Army ▁after ▁World ▁War ▁I . ▁ ▁Aust ro - Pr uss ian ▁War ▁ ▁The ▁IV ▁Corps ▁formed ▁part ▁of ▁Prince ▁Friedrich ▁Karl ▁of ▁Pr uss ia ' s ▁ 1 st ▁Army ▁and ▁fought ▁in ▁the