The petitioner has prayed for the grant of disability pension, which was rejected by the respondents on the ground that invalidation of the petitioner was on account of Chronic Sacroilise Arthritis which was not attributable to military service. The petitioner was recruited as a sepoy in 30th Battalion of CRPF. The petitioner suffered the disease of Chronic Sacroilise Arthritis and was discharged from service on 17th March, 1970 on account of invalidation vide Annexure P-3. He filed an application for grant of disability pension and he was informed vide letters dated 15th July, 1972 and 4th July, 1977 that he was not entitled for invalid pension as he had less than 10 years of service at the time of invalidation. The petitioner has claimed that his disease was on account of service conditions as he was directed to lift heavy wooden logs for construction of bunkers for the defence.