aded ▁Italy ▁in ▁ 4 5 2 , ▁s ack ing ▁cities ▁such ▁as ▁Aqu ile ia ▁and ▁heading ▁for ▁Rome . ▁He ▁alleg edly ▁demanded ▁that ▁the ▁sister ▁of ▁the ▁reign ing ▁Emperor ▁Val entin ian ▁III ▁be ▁sent ▁to ▁him ▁with ▁a ▁dow ry . ▁In ▁response , ▁the ▁em peror ▁sent ▁three ▁en vo ys ▁to ▁negoti ate ▁with ▁Att ila : ▁G enn ad ius ▁Av ien us , ▁one ▁of ▁the ▁cons uls ▁of ▁ 4 5 0 , ▁Mem mi us ▁A em il ius ▁Try get ius , ▁the ▁former ▁urban ▁pre fect , ▁and ▁Leo . ▁Little ▁is ▁known ▁of ▁the ▁specific s ▁of ▁the ▁negoti ations , ▁as ▁a ▁result ▁of ▁which ▁Att ila ▁with d rew . ▁Most ▁ancient ▁and ▁medieval ▁histor ians ▁celebrated ▁Leo ' s ▁actions , ▁giving ▁him ▁all ▁the ▁credit ▁for ▁this ▁successful ▁emb ass y . ▁According ▁to ▁Pro s per ▁of ▁Aqu itaine ▁who ▁was ▁alive ▁at ▁the ▁time ▁of ▁the ▁event , ▁Att ila ▁was ▁so ▁im pressed ▁by ▁Leo ▁that ▁he ▁with d rew . ▁Another ▁near - cont empor ary ▁was ▁the ▁historian ▁Pr is cus ▁who ▁records ▁that ▁Att ila ▁was ▁dis su aded ▁from ▁attack ing ▁Rome ▁by ▁his ▁own ▁men ▁because ▁they ▁fe ared ▁he ▁would ▁share ▁the ▁fate ▁of ▁the ▁Vis ig oth ic ▁king ▁Al ar ic , ▁who ▁died ▁shortly ▁after ▁s ack ing ▁the ▁city ▁in ▁ 4 1 0 . ▁Paul ▁the ▁De acon , ▁in