Menelek's grandson, Lij Yasu, converted to Islam in 1916, and the Christian church deposed him.  
Theodore II ["the Second"] took the throne in 1855.  In 1868, British troops invaded and Theodore committed suicide.  In 1872, Johannes IV ["the fourth"] became king; but he had a civil war with Menelek, whom the Italians backed.  In 1896, Italy invaded but was humiliated.  Menelek's grandson, Lij Yasu, converted to Islam in 1916, and the Christian church deposed him.  His aunt chose a regional governor, Ras Tafari, as his heir.  This is a history of, for 10 points, what African nation?
Theodore II ["the Second"] took the throne in 1855.  In 1868, British troops invaded and Theodore committed suicide.  
Ethiopia (prompt on Abyssinia)