▁dist ract ed ▁from ▁launch ing ▁a ▁pun itive ▁expedition ▁against ▁the ▁Al am anni ▁due ▁to ▁cr ises ▁in ▁Britain ▁and ▁northern ▁Ga ul . ▁The ▁Al am anni ▁prompt ly ▁re - cross ed ▁the ▁Rh ine ▁and ▁pl under ed ▁M og unt iac um . ▁Val entin ian ▁succeeded ▁in ▁arr anging ▁the ▁assass ination ▁of ▁V ith ic ab ius , ▁an ▁Al am ann ic ▁leader , ▁but ▁Val entin ian ▁was ▁more ▁determined ▁to ▁bring ▁the ▁Al am anni ▁under ▁Roman ▁h eg em ony . ▁Val entin ian ▁spent ▁the ▁entire ▁winter ▁of ▁ 3 6 7 ▁gather ing ▁a ▁massive ▁army ▁for ▁a ▁spring ▁off ensive . ▁He ▁sum mon ed ▁the ▁Com es ▁Italia e ▁Sebastian us , ▁with ▁the ▁Italian ▁and ▁Il ly rian ▁leg ions , ▁to ▁join ▁J ov inus ▁and ▁Sever us , ▁the ▁mag ister ▁p edit um . ▁In ▁the ▁spring ▁of ▁ 3 6 8 ▁Val entin ian , ▁his ▁eight - year - old ▁son ▁Gr at ian ▁and ▁the ▁army ▁crossed ▁the ▁Rh ine ▁and ▁Main ▁rivers ▁into ▁Al am ann ic ▁territory . ▁They ▁did ▁not ▁encounter ▁any ▁resistance ▁initially ▁– ▁burning ▁any ▁dwell ings ▁or ▁food ▁stores ▁they ▁found ▁along ▁the ▁way . ▁Finally , ▁Val entin ian ▁fought ▁the ▁Al am anni ▁in ▁the ▁Battle ▁of ▁Sol ic in ium ; ▁the ▁Rom ans ▁were ▁vict orious ▁but ▁suffered ▁heavy ▁cas ual ties . ▁A ▁temporary ▁peace ▁was ▁reached ▁and ▁Val