Several Ethiopian armed opposition groups to form alliance

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Okok Ojulu Okok, center speaks during signing ceremony of the United Front of Ethiopian Federalist and Confederalist Forces to establish a grand United Front to fight against the Abiy Ahmed regime in Ethiopia, in Washington, Friday, Nov. 5, 2021. Ethiopia’s Tigray forces on Friday joined with other armed and opposition groups around the country in an alliance against Prime Minister Abiy Ahmed to seek a political transition after a year of devastating war, and they left the possibility open for his exit by force. (AP Photo/Gemunu Amarasinghe)

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Okok Ojulu Okok, second right receives documents during signing ceremony of the United Front of Ethiopian Federalist and Confederalist Forces to establish a grand United Front to fight against the Abiy Ahmed regime in Ethiopia, in Washington, Friday, Nov. 5, 2021. Ethiopia’s Tigray forces on Friday joined with other armed and opposition groups around the country in an alliance against Prime Minister Abiy Ahmed to seek a political transition after a year of devastating war, and they left the possibility open for his exit by force. (AP Photo/Gemunu Amarasinghe)

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Mahamud Ugas speaks during signing ceremony of the United Front of Ethiopian Federalist and Confederalist Forces to establish a grand United Front to fight against the Abiy Ahmed regime in Ethiopia, in Washington, Friday, Nov. 5, 2021. Ethiopia’s Tigray forces on Friday joined with other armed and opposition groups around the country in an alliance against Prime Minister Abiy Ahmed to seek a political transition after a year of devastating war, and they left the possibility open for his exit by force. (AP Photo/Gemunu Amarasinghe)

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A woman participates in a protest march to mark a year since Ethiopia Prime Minister Abiy Ahmed's administration started fighting against the Tigray, the northernmost region in Ethiopia, in Washington, Thursday, Nov. 4, 2021. (AP Photo/Gemunu Amarasinghe)

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Muslim devotees among the exile Tigray community and their supporters pray outside Ronal Regan building during a protest march to mark a year since Ethiopia Prime Minister Abiy Ahmed's administration started fighting against the Tigray, the northernmost region in Ethiopia, Thursday, Nov. 4, 2021, in Washington. (AP Photo/Gemunu Amarasinghe)

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Pedestrians buy food from a street vendor in the Piazza old town area of the capital Addis Ababa, Ethiopia Thursday, Nov. 4, 2021. Urgent new efforts to calm Ethiopia's escalating war are unfolding Thursday as a U.S. special envoy visits and the president of neighboring Kenya calls for an immediate cease-fire while the country marks a year of conflict. (AP Photo)

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People play with a ball in the Piazza old town area of the capital Addis Ababa, Ethiopia Thursday, Nov. 4, 2021. Urgent new efforts to calm Ethiopia's escalating war are unfolding Thursday as a U.S. special envoy visits and the president of neighboring Kenya calls for an immediate cease-fire while the country marks a year of conflict. (AP Photo)

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A homeless man watches as exile Tigray community and their supporters march to mark a year since Ethiopia Prime Minister Abiy Ahmed's administration started fighting against the Tigray, the northernmost region in Ethiopia, at the U.S. Capitol, Thursday, Nov. 4, 2021, in Washington. (AP Photo/Gemunu Amarasinghe)

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Exile Tigray community and their supporters march to mark a year since Ethiopia Prime Minister Abiy Ahmed's administration started fighting against the Tigray, the northernmost region in Ethiopia, at the U.S. Capitol, Thursday, Nov. 4, 2021, in Washington. (AP Photo/Gemunu Amarasinghe)

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Exile Tigray community and their supporters march to mark a year since Ethiopia Prime Minister Abiy Ahmed's administration started fighting against the Tigray, the northernmost region in Ethiopia, at the U.S. Capitol, Thursday, Nov. 4, 2021, in Washington. (AP Photo/Gemunu Amarasinghe)