▁m idget ▁sub marine ▁at ▁ 0 0 : 4 1 ▁on ▁December ▁ 8 ▁claim ing ▁damage ▁to ▁one ▁or ▁more ▁large ▁war ships ▁inside ▁Pear l ▁Har bor . ▁ ▁In ▁ 1 9 9 2 , ▁ 2 0 0 0 , ▁and ▁ 2 0 0 1 , ▁Hawai i ▁Under se a ▁Research ▁Labor atory ' s ▁subm ers ibles ▁found ▁the ▁w reck ▁of ▁the ▁fifth ▁m idget ▁sub marine ▁lying ▁in ▁three ▁parts ▁outside ▁Pear l ▁Har bor . ▁The ▁w reck ▁was ▁in ▁the ▁de br is ▁field ▁where ▁much ▁sur plus ▁U . S . ▁equipment ▁was ▁dump ed ▁after ▁the ▁war , ▁including ▁vehicles ▁and ▁landing ▁craft . ▁Both ▁of ▁its ▁tor ped o es ▁were ▁missing . ▁This ▁correl ates ▁with ▁reports ▁of ▁two ▁tor ped o es ▁fired ▁at ▁the ▁light ▁cru iser ▁ ▁at ▁ 1 0 : 0 4 ▁at ▁the ▁entrance ▁of ▁Pear l ▁Har bor , ▁and ▁a ▁possible ▁tor ped o ▁fired ▁at ▁destroy er ▁ ▁at ▁ 0 8 : 2 1 . ▁ ▁Japanese ▁declaration ▁of ▁war ▁ ▁The ▁attack ▁took ▁place ▁before ▁any ▁formal ▁declaration ▁of ▁war ▁was ▁made ▁by ▁Japan , ▁but ▁this ▁was ▁not ▁Admir al ▁Yam am oto ' s ▁intention . ▁He ▁originally ▁st ip ulated ▁that ▁the ▁attack ▁should ▁not ▁commence ▁until ▁thirty ▁minutes ▁after ▁Japan ▁had ▁informed ▁the ▁United ▁States ▁that ▁peace ▁negoti ations ▁were ▁at ▁an ▁end . ▁However , ▁the ▁attack ▁began ▁before ▁the ▁notice