▁a ▁ 6 , 0 0 0 - man ▁army ▁led ▁by ▁his ▁son ▁N ares uan ▁ost ens ibly ▁for ▁N anda ' s ▁A va ▁campaign . ▁But ▁the ▁S iam ese ▁army ▁did ▁not ▁march ▁to ▁A va ▁as ▁ordered ▁but ▁hover ed ▁around ▁P egu . ▁After ▁A va ▁fell ▁quickly , ▁the ▁S iam ese ▁army ▁with d rew ▁to ▁Mart aban ▁( M ott ama ), ▁and ▁declared ▁independence ▁on ▁. ▁N anda ▁dispatch ed ▁an ▁expedition ▁force ▁( 4 , 0 0 0 ▁men , ▁ 4 0 0 ▁horses , ▁ 4 0 ▁ele ph ants ) ▁to ▁ch ase ▁the ▁S iam ese ▁troops . ▁The ▁Bur m ese ▁army ▁finally ▁caught ▁up ▁with ▁the ▁S iam ese ▁army ▁near ▁the ▁Sit ta ung ▁River , ▁but ▁was ▁driven ▁away ▁when ▁N ares uan ▁shot ▁a ▁mus ket ▁across ▁the ▁river ▁and ▁killed ▁their ▁commander . ▁N anda , ▁en rag ed ▁gathered ▁another ▁army ▁( 7 , 0 0 0 ▁men , ▁ 5 0 0 ▁horses , ▁ 5 0 ▁ele ph ants ), ▁and ▁followed ▁up . ▁His ▁son ▁M ing yi ▁S wa ▁was ▁his ▁deput y . ▁Un like ▁his ▁father ' s ▁met icul ously ▁planned ▁S iam ese ▁campaign s , ▁the ▁expedition ▁was ▁hast ily ▁planned . ▁An ▁ 1 1 , 0 0 0 - man ▁invasion ▁force ▁could ▁have ▁never ▁conquer ed ▁S iam , ▁let ▁alone ▁in ▁the ▁ra iny ▁season . ▁Indeed