Ethiopia's Tigray Crisis: Why Nobel laureate Abiy Ahmed sent his troops to battle

"War makes for bitter men. Heartless and savage men," Ethiopia's Prime Minister Abiy Ahmed said when he received the Nobel Peace Prize less than a year ago - only for him to now wage a military operation in his own country. Over about a three-week period, his troops fought their way through Tigray, right up in the north of Ethiopia, to oust the region's ruling party, the Tigray People's Liberation Front (TPLF), accusing it of attacking a federal military base. A former guerrilla movement which first rose to power in 1991, Tigray was the last political bastion of the TPLF after it lost control of the federal government to Mr Abiy in 2018. Mr Abiy became prime minister...