The Ogaden War, also known as the Ethio-Somali War, was a military conflict between Somalia and Ethiopia fought from July 1977 to March 1978 over control of the sovereignty of the Ogaden region. Somalia launched an invasion in support of the Western Somali Liberation Front (WSLF) insurgency, triggering a broader inter-state war. The intervention drew the disapproval of the Soviet Union, which subsequently withdrew its support for Somalia and backed Ethiopia instead.