In the late 1940s and early 1950s during his time in
Addis Ababa, Eritrean politics was at a crossroads because of the burgeoning Eritrean nationalist movement. Like many Eritrean patriots, Osman had a strong stand on the need for
Eritrean independence. His activities were put under surveillance by the Ethiopian authorities and, in 1960, he was later forced into exile in Aden, Yemen. Revolutionary leaders such as
Romodan Mohammed Nur, Alamin Mohammed Said and Ibrahim Affa that made great contribution towards the struggle of Eritrean Independence were some of his students from Hirghigo School. Osman Saleh Sabbe died of a sudden illness in 1987 in a hospital in Cairo, Egypt. ==Political life==