Rubuta ci gaba don wannan sakin layi - Bayan halartar Kwalejin Sojojin Indiya ta Rashtriya (RIMC), ya sami izini a matsayin Midshipman a cikin Royal Indian Navy a 1941 a cikin reshen zartarwa. Ya shiga cikin Yaƙin Duniya na II a matsayin jami'i a cikin Royal Indian Navy a madadin Burtaniya a gaban Turai, kuma an tura shi zuwa Kwalejin Naval Royal Britannia bayan ƙarshen
na yakin duniya na biyu a 1945. Bayan kammala karatunsa a cikin digiri na ma'aikata, ya koma Biritaniya Indiya kuma daga baya ya zama Laftanar a cikin Royal Indian Navy kuma ya yanke shawarar zaɓar Pakistan a matsayin sakamakon rabuwa da Biritaniya Indiya, kuma a wannan shekarar. Hassan yana cikin jami'an sojan ruwa ashirin na farko da suka yanke shawarar shiga Royal Pakistan Navy (RPN) a matsayin Laftanar tare da lambar sabis PN.0073 wanda aka jera a cikin jerin tsofaffin da Royal Indian Navy ta aika wa Ma'aikatar Tsaro ta Pakistan. An ce shi dan wasan hockey ne mai kyau a cikin sojan ruwa inda ya jagoranci tawagar hockey na sojan ruwa a kan kungiyar hockey ta Indiya; kungiyar hockey ta RPN ta yi nasara da tazarar kwallaye biyar zuwa daya da aka samu a kan kungiyar RIN.