▁and ▁thus ▁bi ased , ▁the ▁Chinese ▁government ▁purs ued ▁an ▁investigation ▁by ▁the ▁World ▁Peace ▁Council . ▁A ▁committee ▁led ▁by ▁Joseph ▁Need ham ▁gathered ▁evidence ▁for ▁a ▁report ▁that ▁included ▁testim ony ▁from ▁e y ew it ness es , ▁do ctors , ▁and ▁four ▁American ▁Korean ▁War ▁prisoners ▁who ▁confirmed ▁use ▁of ▁bi ological ▁weapons ▁by ▁the ▁U . S . ▁In ▁eastern ▁Europe , ▁China , ▁and ▁North ▁Korea ▁it ▁was ▁widely ▁believed ▁that ▁the ▁accus ations ▁were ▁true . ▁A ▁ 1 9 8 8 ▁book ▁Korea : ▁The ▁Un known ▁War , ▁by ▁Western ▁histor ians ▁Jon ▁Hall iday ▁and ▁Bruce ▁C um ings , ▁also ▁suggested ▁the ▁claims ▁might ▁be ▁true . ▁ ▁In ▁ 1 9 9 8 , ▁Canadian ▁research ers ▁and ▁histor ians ▁Stephen ▁End ic ott ▁and ▁Edward ▁H ag erman ▁of ▁York ▁University ▁made ▁the ▁case ▁that ▁the ▁accus ations ▁were ▁true ▁in ▁their ▁book , ▁The ▁United ▁States ▁and ▁Bi ological ▁War fare : ▁Sec rets ▁from ▁the ▁Early ▁Cold ▁War ▁and ▁Korea . ▁The ▁book ▁received ▁mostly ▁positive ▁reviews , ▁out ▁of ▁a ▁collection ▁of ▁ 2 0 ▁reviews ▁c ited , ▁ 2 ▁were ▁negative , ▁calling ▁it ▁" bad ▁history " ▁and ▁" app alling ", ▁while ▁others ▁pra ised ▁the ▁authors , ▁" End ic ott ▁and ▁H ag erman ▁is ▁far ▁and ▁away ▁the ▁most ▁author itative ▁work ▁on ▁the ▁subject " ▁and ▁" the ▁most ▁impress ive , ▁expert ly ▁research ed ▁and ,