▁the ▁cave , ▁and ▁a ▁rail ▁line ▁ran ▁along ▁the ▁rid g eline ▁above ▁the ▁cave . ▁In ▁addition ▁to ▁Part isan ▁headquarters , ▁various ▁Part isan ▁and ▁Commun ist ▁Party ▁of ▁Y ug oslav ia ▁support , ▁training ▁and ▁youth ▁organis ations ▁were ▁also ▁based ▁in ▁and ▁around ▁Dr var ▁at ▁the ▁time , ▁along ▁with ▁the ▁T ito ▁Esc ort ▁Battalion ▁which ▁was ▁responsible ▁for ▁T ito ' s ▁personal ▁safety . ▁The ▁British ▁and ▁Soviet ▁military ▁miss ions ▁to ▁the ▁Part is ans ▁were ▁also ▁station ed ▁in ▁villages ▁close ▁to ▁Dr var , ▁as ▁were ▁some ▁United ▁States ▁military ▁officers ▁on ▁various ▁miss ions . ▁The ▁British ▁mission ▁was ▁head ed ▁by ▁Brig ad ier ▁Fitz roy ▁Mac lean , ▁who ▁was ▁in ▁London ▁at ▁the ▁time ▁of ▁the ▁ra id , ▁and ▁included ▁Major ▁Rand olph ▁Church ill , ▁son ▁of ▁W inst on ▁Church ill . ▁At ▁the ▁time ▁of ▁Operation ▁Rö ss els pr ung ▁( ), ▁the ▁British ▁mission ▁was ▁led ▁by ▁its ▁second - in - command , ▁Lieutenant ▁Colonel ▁Viv ian ▁Street . ▁ ▁Part isan ▁dispos itions ▁around ▁Dr var ▁ ▁A part ▁from ▁Part isan ▁headquarters ▁and ▁related ▁organis ations ▁in ▁and ▁around ▁Dr var , ▁there ▁were ▁between ▁ 1 2 , 0 0 0 ▁and ▁ 1 6 , 0 0 0 ▁Part is ans ▁in ▁the ▁area ▁of ▁operations ▁that ▁would ▁be ▁subject ▁to ▁the ▁ground ▁assault ▁by ▁XV ▁Mountain ▁Corps . ▁In ▁the ▁vic inity ▁of ▁Dr