Addis Ababa,Ethiopia,1935?,Ethiopian soldiers marching with pack mules,Keystone | eBay
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File:Mules and Camels to Market - Axum (Aksum) - Ethiopia (8702242838).jpg - Wikimedia Commons
History of the Mule - American Mule Museum
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Ethiopia's Low-Tech, High-Value Transportation
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Black and white photo of the War in Ethiopia after the Italian invasion of 1935; arms and munitions of the Ethiopian Army being transported by two mules Stock Photo - Alamy