By the late 1980s, under Benin's Marxist government, the quality of education was seriously eroded and, by 1989, the education system was in a state of collapse.
The quality of education was seriously eroded. This was under Benin's Marxist government. This was by the late 1980s. The education system was in a state of collapse. This was by 1989. This was by the late 1980s.