▁German ▁plan ▁to ▁sink ▁them ▁where ▁they ▁would ▁block ▁the ▁har bour ▁entrance . ▁The ▁mission ▁also ▁aim ed ▁to ▁attack ▁German ▁U - bo ats ▁in ▁the ▁har bour . ▁British ▁ch ari ots ▁would ▁attack ▁the ▁cru is ers ▁whilst ▁Mari ass al to ' s ▁G amma ▁F rog men ▁would ▁attack ▁U - bo ats ▁p enn ed ▁in ▁the ▁har bour . ▁On ▁ 2 ▁June ▁ 1 9 4 4 ▁the ▁Italian ▁destroy er ▁ ▁sa iled ▁from ▁Bast ia ▁in ▁C ors ica ▁to ▁La ▁Spe zia ▁carrying ▁three ▁speed bo ats , ▁and ▁Italian ▁f rog men ▁including ▁Luigi ▁Dur and ▁De ▁La ▁P enne , ▁and ▁two ▁British ▁ch ari ots . ▁One ▁ch ari ot ▁broke ▁down ▁and ▁was ▁abandoned , ▁though ▁the ▁other ▁successfully ▁s ank ▁Bol z ano . ▁However ▁the ▁G amma ▁men ▁were ▁un success ful ▁in ▁their ▁attack ▁on ▁the ▁U - bo at ▁pens . ▁All ▁the ▁participants ▁escaped ▁to ▁link ▁with ▁part isan ▁groups ▁on ▁land . ▁ ▁In ▁April ▁ 1 9 4 5 ▁a ▁final ▁mission , ▁Operation ▁Toast , ▁was ▁planned . ▁This ▁was ▁aim ed ▁at ▁s inking ▁the ▁newly ▁converted ▁sh ipping ▁l iner ▁now ▁the ▁aircraft ▁car rier ▁Aqu ila , ▁just ▁completed ▁in ▁Gen oa . ▁For ▁this ▁Mari ass al to ▁men ▁would ▁make ▁use ▁of ▁two ▁British ▁ch ari ots , ▁as ▁they ▁had ▁none ▁of ▁their ▁own ▁S LC s ▁available . ▁On ▁ 1 8