 A month earlier, Mengistu accused Somalia of infiltrating Somali National Army (SNA) soldiers into the Ogaden to fight alongside the Western Somali Liberation Front (WSLF), and despite considerable evidence to the contrary, Somalia's leader Siad Barre strongly denied this by stating SNA "volunteers" were being allowed to help the WSLF.Although both countries were Soviet-backed communist states, Barre sought to exploit Ethiopia's weakness since the 1974 revolution to incorporate the Ogaden on a platform of Somali nationalism and pan-Somalism.Under the Derg, Ethiopia became the Warsaw Pact's closest ally in Africa and one of the best-armed nations of the region as a result of military aid, chiefly from the Soviet Union, Libya, East Germany, Israel, Cuba and North Korea.