0 , 0 0 0 ▁surv iv ors , ▁which ▁meant ▁that ▁only ▁about ▁ 3 0 ▁percent ▁of ▁the ▁em igr ants ▁had ▁surv ived ▁the ▁war . ▁ ▁Ca esar ' s ▁report ▁has ▁been ▁partly ▁confirmed ▁by ▁exc av ations ▁near ▁Gene va ▁and ▁Bib ract e . ▁However , ▁much ▁of ▁his ▁account ▁has ▁not ▁yet ▁been ▁cor ro bor ated ▁by ▁arch ae ology , ▁whilst ▁his ▁narr ative ▁must ▁in ▁wide ▁parts ▁be ▁considered ▁as ▁bi ased ▁and , ▁in ▁some ▁points , ▁unlikely . ▁For ▁a ▁start , ▁only ▁one ▁out ▁of ▁the ▁fifteen ▁C elt ic ▁opp ida ▁in ▁the ▁Hel vet ii ▁territory ▁so ▁far ▁has ▁yield ed ▁evidence ▁for ▁destruction ▁by ▁fire . ▁Many ▁other ▁sites , ▁for ▁example ▁the ▁san ctu ary ▁at ▁M orm ont , ▁do ▁not ▁exhib it ▁any ▁signs ▁of ▁damage ▁for ▁the ▁period ▁in ▁question , ▁and ▁C elt ic ▁life ▁continued ▁seem ingly ▁und ist urbed ▁for ▁the ▁rest ▁of ▁the ▁ 1 st ▁century ▁BC ▁up ▁to ▁the ▁beginning ▁of ▁the ▁Roman ▁era , ▁with ▁an ▁acc ent ▁rather ▁on ▁an ▁increase ▁in ▁prosper ity ▁than ▁on ▁a ▁“ Hel vet ic ▁tw il ight ”. ▁With ▁the ▁hon ou rable ▁status ▁as ▁fo eder ati ▁taken ▁into ▁account , ▁it ▁is ▁hard ▁to ▁believe ▁that ▁the ▁Hel vet ii ▁ever ▁sust ained ▁cas ual ties ▁quite ▁as ▁heavy ▁as ▁those ▁given ▁by ▁the ▁Roman ▁military ▁leader . ▁ ▁In ▁general , ▁numbers ▁written ▁down