The ethiopian christian dynasty which experienced a long-lasting conflict with african muslims was the

From 1769 to 1855, the Ethiopian Empire went through the "Age of Princes" (Zemene Mesafint). This was a period in Ethiopian history when the country was rent by conflicts between warlords, the Emperor was reduced to little more than a figurehead confined to the capital city of Gondar, and both society and culture stagnated. Religious conflict both within the Ethiopian Orthodox Church and with Ethiopian Muslims were often used as the pretext for the powerful to battle each other. The "Age of Princes" ended with the reign of Tewodros II.

Thats not a question. what do you want me to do?