entin ian ▁returned ▁to ▁T rier ▁for ▁the ▁winter . ▁During ▁ 3 6 9 , ▁Val entin ian ▁ordered ▁new ▁def ensive ▁works ▁to ▁be ▁constructed ▁and ▁old ▁structures ▁ref urb ished ▁along ▁the ▁length ▁of ▁the ▁Rh ine ’ s ▁west ▁bank . ▁B old ly , ▁he ▁ordered ▁the ▁construction ▁of ▁a ▁for tr ess ▁across ▁the ▁Rh ine ▁in ▁the ▁mountains ▁near ▁modern ▁Heidel berg . ▁The ▁Al am anni ▁sent ▁en vo ys ▁to ▁protest , ▁but ▁they ▁were ▁dismiss ed . ▁The ▁Al am anni ▁attacked ▁the ▁for tr ess ▁while ▁it ▁was ▁still ▁under ▁construction ▁and ▁destroyed ▁it . ▁ ▁In ▁ 3 7 0 ▁the ▁Sax ons ▁renew ed ▁their ▁attacks ▁on ▁northern ▁Ga ul . ▁N ann ien us , ▁the ▁comes ▁in ▁charge ▁of ▁the ▁troops ▁in ▁northern ▁Ga ul , ▁ur ged ▁Sever us ▁to ▁come ▁to ▁his ▁aid . ▁After ▁several ▁mod est ▁success es , ▁a ▁tr uce ▁was ▁called ▁and ▁the ▁Sax ons ▁handed ▁over ▁to ▁the ▁Rom ans ▁young ▁men ▁fit ▁for ▁duty ▁in ▁the ▁Roman ▁military ▁– ▁in ▁exchange ▁for ▁free ▁passage ▁back ▁to ▁their ▁hom eland . ▁The ▁Rom ans ▁amb ushed ▁them ▁and ▁destroyed ▁the ▁entire ▁inv ading ▁force . ▁ ▁Val entin ian ▁mean while ▁tried ▁to ▁persu ade ▁the ▁Burg und ians ▁– ▁bitter ▁enemies ▁of ▁the ▁Al am anni ▁– ▁to ▁attack ▁Mac rian , ▁a ▁powerful ▁Al am ann ic ▁ch ie ft ain . ▁If ▁the ▁Al am anni ▁tried