Lebanon.
The country that had a civil war that lasted from 1975 to 1991 was Lebanon. ,
There were three countries that I know of that were in civil wars in 1975. Lebanon, Angola, and Mozambique.
Lebanon had a 15-year civil war from 1975 to 1990, fueled by religious and political differences among its diverse population.
Lebanon
The Lebanese civil war took place from 1975 and ended in 1990. It took place in all of Lebanon. Starting from Beirut and ending in Byblos.
Civil War - 1975 VG was released on: USA: 1975
Pakistan
Lebanon has passed through a series of occupations and wars from the Ottoman occupation to the French mandate, and the civil war that started from 1975 to 1990, then the period of the Syrian occupation which led to a prospered corruption.
The Civil War - 1990 is rated/received certificates of: Australia:G
Angolan Civil War happened in 1975.
Mali Civil War, 1990-1996 .