 Nyorai kupfuurira nokuda ndima iyi - Munguva Operation Product uye Operation Kraairakatangwa navaDutch kuti vapinde muNorth Sumatra, bazi reNorth Sumatra reIndonesian Christian Party rakaumba Arrow Division. Chikamu ichi chakatungamirwa naSiregar semukuru mukuru, ane zita rekuti Partahuluk Raso . Vashandi vanoverengeka pakutanga vakanga vari vadzidzi vake kana kuti vaizova vadzidzi vake. Pakutanga, HQ yechikamu yaive muPematang Siantar, asi yakazotamira kuMuara. Pamwe chete neshamwari yake Bosar Sianipar, zita rekodhi Mondar Mandir , Siregar uye iye akazova mumwe wevanonyanya kutsvakwa neDutch Army. Chikamu ichi chakakurumbira muPematang Siantar nekuda kwekudzivirirwa kwezvikwata zvese kurwisa uto rakakura reDutch rakakwanisa kupwanya masvingo eMedan Area Lembung. 