▁the ▁opening ▁of ▁the ▁B ott war ▁Valley ▁Railway ▁( B ott wart al bahn ) ▁produced ▁passenger ▁traffic ▁from ▁the ▁B ott war ▁Valley ▁to ▁Stuttgart ▁and ▁in ▁ 1 9 1 8 ▁the ▁opening ▁of ▁the ▁mar sh alling ▁yard ▁in ▁K orn west heim ▁meant ▁that ▁fre ight ▁traffic ▁ran ▁on ▁the ▁Fran con ia – H ess ental – Back n ang – K orn west heim ▁route . ▁ ▁After ▁Deutsche ▁Reichs bahn ▁took ▁over ▁the ▁facilities ▁of ▁the ▁Royal ▁Wür ttemberg ▁State ▁Rail ways ▁in ▁ 1 9 2 1 , ▁the ▁original ▁const rained ▁stations ▁at ▁Back n ang , ▁Burg st all , ▁Mar bach ▁and ▁Ludwig s burg ▁were ▁expanded . ▁This ▁was ▁accompanied ▁by ▁the ▁dup lication ▁of ▁the ▁F avor ite park – L ud wig s burg ▁line . ▁ ▁Due ▁to ▁its ▁strateg ic ▁importance ▁as ▁an ▁east – west ▁axis , ▁the ▁line ▁was ▁the ▁repeated ▁target ▁of ▁Al lied ▁air ▁attacks ▁at ▁the ▁end ▁of ▁the ▁Second ▁World ▁War . ▁On ▁a ▁Sunday ▁morning ▁in ▁the ▁spring ▁of ▁ 1 9 4 5 , ▁a ▁fre ight ▁train ▁running ▁towards ▁B iet ig heim ▁through ▁Bei hing en ▁( now ▁part ▁of ▁Frei berg ▁am ▁Ne ck ar ) ▁was ▁covered ▁with ▁bomb s ▁by ▁a ▁f ighter - b om ber ▁and ▁destroyed . ▁The ▁deep ▁c utt ings ▁near ▁B iet ig heim ▁were ▁also ▁badly ▁dam aged ▁by ▁bomb s . ▁On ▁ 2 0