, ▁the ▁troops ▁were ▁caught ▁un prep ared ▁by ▁the ▁flo oded ▁coun tr ys ide ▁by ▁the ▁Ch ao ▁Ph ray a , ▁and ▁were ▁nearly ▁w ip ed ▁out ▁by ▁S iam ese ▁on ▁their ▁war ▁can o es . ▁ ▁Second ▁campaign ▁( 1 5 8 6 – 8 7 ) ▁In ▁ 1 5 8 6 , ▁the ▁king ▁of ▁Bur ma ▁planned ▁an ▁invasion ▁of ▁S iam ▁again . ▁The ▁invasion ▁was ▁set ▁for ▁northern ▁S iam ▁first . ▁In ▁March ▁ 1 5 8 6 , ▁an ▁army ▁( 1 2 , 0 0 0 ▁troops , ▁ 1 , 2 0 0 ▁horses , ▁ 1 0 0 ▁ele ph ants ) ▁led ▁by ▁M ing yi ▁S wa ▁inv aded ▁northern ▁S iam ▁from ▁Lan ▁Na . ▁But ▁the ▁army ▁could ▁not ▁get ▁past ▁a ▁heavily ▁fort ified ▁L amp ang ▁led ▁by ▁N ares uan , ▁and ▁had ▁to ▁withdraw ▁in ▁June . ▁Und eter red , ▁N anda ▁Bay in ▁launched ▁a ▁two - pr ong ed ▁invasion ▁in ▁the ▁following ▁dry ▁season ▁on ▁ ▁with ▁( 2 5 , 0 0 0 ▁troops , ▁ 1 , 2 0 0 ▁horses , ▁ 2 2 0 ▁ele ph ants ). ▁This ▁was ▁the ▁largest ▁force ▁the ▁Bur m ese ▁King ▁was ▁able ▁to ▁field , ▁but ▁it ▁was ▁in cap able ▁of ▁conqu ering ▁S iam ▁and ▁was ▁only ▁a ▁third ▁of ▁the ▁last ▁invasion ▁by ▁Bay in na ung ▁in ▁