▁in ▁the ▁league ▁and ▁success es ▁in ▁Europe ▁ ▁The ▁ 1 9 7 0 s ▁went ▁down ▁as ▁the ▁most ▁successful ▁in ▁the ▁club ' s ▁history . ▁▁ ▁Under ▁coach ▁H ennes ▁We is we iler , ▁the ▁young ▁side ▁displayed ▁an ▁off ensive - mind ed ▁philosophy ▁and ▁powerful ▁play ▁that ▁attract ed ▁fans ▁from ▁all ▁over ▁Germany . ▁Bor uss ia ▁won ▁the ▁championship ▁five ▁times , ▁more ▁than ▁any ▁other ▁team ▁in ▁this ▁time . ▁At ▁the ▁same ▁time ▁a ▁rival ry ▁developed ▁with ▁FC ▁Bayern ▁Mun ich , ▁with ▁which ▁Bor uss ia ▁together ▁asc ended ▁in ▁ 1 9 6 5 ▁to ▁the ▁Bundes liga . ▁ ▁After ▁the ▁club ▁had ▁twice ▁finished ▁in ▁previous ▁years ▁third ▁place ▁in ▁the ▁table , ▁co ached ▁H ennes ▁We is we iler ▁in ▁the ▁ 1 9 6 9 / 7 0 ▁season ▁especially ▁the ▁defence . ▁De vi ating ▁from ▁the ▁" fo al " ▁concept , ▁Bor uss ia ▁bought ▁for ▁the ▁first ▁time ▁experienced ▁def ensive ▁players ▁like ▁L ug gi ▁Müller ▁and ▁Klaus - Di eter ▁S iel off . ▁With ▁Ul rik ▁le ▁Fe vre ▁the ▁club ▁signed ▁their ▁first ▁Dan ish ▁player , ▁later ▁followed ▁by ▁Hen ning ▁J ensen ▁and ▁All an ▁Sim ons en . ▁This ▁season ▁saw ▁the ▁first ▁Bundes liga ▁victory ▁over ▁Bayern . ▁After ▁a ▁ 5 – 1 ▁win ▁over ▁A lem ann ia ▁A achen ▁on ▁ 3 1 ▁October ▁ 1 9 6 9