▁moved ▁up ▁to ▁Ah ven k os ki ▁and ▁attacked ▁the ▁next ▁morning . ▁The ▁battle ▁last ed ▁two ▁days , ▁but ▁they ▁were ▁not ▁able ▁to ▁break ▁through ▁the ▁Red ▁lines . ▁On 2 5 ▁April , ▁the ▁Red s ▁left ▁their ▁positions ▁on ▁the ▁western ▁side ▁of ▁the ▁K ymi ▁river ▁and ▁retre ated ▁across ▁it , ▁destroy ing ▁brid ges ▁behind ▁them . ▁The ▁Germ ans ▁occupied ▁the ▁tren ches ▁on ▁the ▁western ▁side ▁of ▁the ▁K ymi ▁river , ▁and ▁the ▁battle ▁paused ▁for ▁the ▁next ▁eight ▁days . ▁ ▁The ▁Red s ' ▁front ▁in ▁K are lia ▁col lapsed ▁after ▁the ▁Battle ▁of ▁V y borg ▁() ▁on ▁ 2 9 A pril ▁and ▁they ▁suffered ▁a ▁decis ive ▁loss ▁at ▁the ▁Battle ▁of ▁La ht i . ▁This ▁meant ▁that ▁the ▁K ymi ▁valley ▁region ▁was ▁now ▁the ▁last ▁Red ▁strong hold . ▁A ▁ce ase fire ▁was ▁established ▁on ▁ 3 ▁May , ▁and ▁the ▁parties ▁started ▁negoti ations ▁for ▁a ▁Red ▁surrender . ▁ ▁Red ▁Finland ▁surr enders ▁ ▁The ▁Red s ▁in ▁K ymen la ak so ▁started ▁surrender ing ▁on ▁ 4 ▁May , ▁first ▁in ▁the ▁village ▁of ▁In k ero inen ▁in ▁An jal ank os ki . ▁The ▁same ▁evening ▁the ▁Wh ites ▁entered ▁Kot ka , ▁where ▁ 4 , 0 0 0 ▁Red s ▁surrender ed ▁with ▁hardly ▁any ▁resistance . ▁The ▁last ▁Red s ▁left ▁were ▁now ▁the ▁ 8 0 0 – 9 0 0