After the war, he continued his education at Al-Azhar University in Egypt, and later The American University in Cairo from 1951 to 1955. In 1956, he became commander of 21st Infantry Regiment of Indonesian Army under South Kalimantan 4th Territorial Command. Basry was an anti-communist figure and disliked the growing influence of Communist Party of Indonesia (PKI) in Kalimantan. On August 22, 1960, he issued a decree banning PKI activities in South Kalimantan, which later would be followed by commanders of South Sulawesi and South Sumatra. The event, known as Three Souths Affair ("Peristiwa Tiga Selatan") angered Sukarno, who demanded the letter to be retracted. Basry ignored Sukarno's demand, which caused rising tension between Indonesian Army and PKI, later culminated in subsequent purge of communist. Basry became Deputy of Territorial Commando of Kalimantan in 1961 and also a member of People's Consultative Assembly from 1960 to 1966. He retired from the military in 1963 and his career became focused on politics, as he became a representative in People's Representative Council between 1978 and 1982. During this period, he was also active in the establishment of Lambung Mangkurat University and became its first rector.