nik . ▁He ▁graduated ▁in ▁ 1 9 3 2 , ▁after ▁three ▁years , ▁with ▁the ▁rank ▁of ▁Cor v ette ▁Lieutenant . ▁ ▁April ▁War ▁and ▁death ▁ ▁At ▁the ▁out break ▁of ▁the ▁April ▁War ▁in ▁ 1 9 4 1 , ▁Serge j ▁Ma š era ▁was ▁a ▁lieutenant ▁on ▁the ▁destroy er ▁ ▁station ed ▁in ▁Dob ro ta ▁on ▁the ▁Bay ▁of ▁Kot or . ▁ ▁He ▁was ▁the ▁First ▁Officer ▁in ▁charge ▁of ▁the ▁ship ' s ▁art illery . ▁ ▁At ▁that ▁time , ▁Zag reb ▁( t ogether ▁with ▁the ▁destroy ers ▁Bel grade ▁and ▁Dub rov nik ) ▁was ▁one ▁of ▁the ▁most ▁recent ▁Y ug oslav ▁Navy ▁ships , ▁and ▁was ▁therefore ▁the ▁prime ▁target ▁of ▁an ▁air ▁attack ▁of ▁five ▁Reg ia ▁Aer onaut ica ▁bom bers ▁on ▁the ▁ 6 th ▁of ▁April . ▁The ▁attack ▁was ▁carried ▁out ▁from ▁a ▁great ▁height , ▁however , ▁and ▁no ▁damage ▁was ▁suffered . ▁Italian ▁aircraft ▁bom bed ▁the ▁Bay ▁once ▁again ▁on ▁the ▁ 1 3 th , ▁but ▁even ▁then ▁did ▁not ▁damage ▁Zag reb . ▁Two ▁days ▁later , ▁the ▁dem oral ized ▁Y ug oslav ▁Royal ▁Army ▁asked ▁for ▁a ▁tr uce , ▁and ▁the ▁cre ws ▁of ▁all ▁ships ▁station ed ▁in ▁the ▁Bay ▁of ▁Kot or ▁were ▁instruct ed ▁to ▁ce ase ▁fire ▁and ▁surrender ▁peace fully . ▁Most ▁of ▁the ▁sail ors ▁land ed ▁on ▁the ▁main land . ▁On ▁the ▁ 1 7 th