▁at ▁Vall amp rak ara ▁( the ▁present - day ▁Vall am ▁near ▁Th an jav ur ) ▁and ▁defeated ▁him . ▁This ▁battle ▁is ▁not ▁mentioned ▁in ▁any ▁of ▁Ach uth appa ' s ▁own ▁ins cri ptions ▁and ▁the ▁only ▁references ▁to ▁this ▁war ▁are ▁found ▁in ▁the ▁P ud uk k otta i ▁pl ates ▁of ▁Ad iv ir ar ama ▁S riv all ab ha ▁and ▁Var ath ung ar ama , ▁both ▁dated ▁ 1 5 8 3 . ▁The ▁valid ity ▁of ▁these ▁pl ates ▁have ▁since ▁been ▁question ed ▁as ▁V enk at ap ath i ▁did ▁not ▁asc end ▁the ▁throne ▁till ▁ 1 5 8 6 . ▁ ▁Camp aign ▁against ▁the ▁Portuguese ▁▁ ▁The ▁Sah ity ar at nak ara ▁describe ▁Ach uth appa ' s ▁victory ▁over ▁Par as ik as ▁at ▁Nag ap att in am . ▁Ram ab adr amba ▁too ▁refers ▁to ▁the ▁campaign ▁but ▁names ▁Ach uth appa ' s ▁enemies ▁as ▁" Par ang i ", ▁the ▁T amil ▁word ▁used ▁for ▁colonial ▁Europe ans . ▁During ▁the ▁early ▁ 1 7 th ▁century , ▁the ▁Portuguese ▁were ▁w aging ▁a ▁concentr ated ▁campaign ▁to ▁conquer ▁J aff na ▁and ▁Ach uth appa ' s ▁attack ▁on ▁Nag ap att in am ▁might ▁have ▁been ▁launched ▁to ▁assist ▁the ▁king ▁of ▁J aff na . ▁To ▁supp lant ▁the ▁Portuguese , ▁Ach uth appa ▁also ▁maintained ▁friendly ▁relations ▁with ▁the ▁Dutch ▁towards ▁the ▁end ▁of ▁his ▁reign