Answer
Maga was imprisoned after Mathieu Kérékou's coup. This was because Maga was a threat to Kérékou's power. Maga had been a popular leader in Dahomey and had a large following. Kérékou feared that Maga would try to overthrow him. Therefore, he had Maga imprisoned. This act of imprisonment was a way for Kérékou to consolidate his power and prevent any potential challenges to his rule.