I'm pretty sure it's just supposed to be "America" in general... and Japanese people think "Guile" when they think "America". At least, they sure seem to think of muscle-men with crew cuts in wife beaters.
Also, some concise background on what this image represents:
Wikipedia says:
Styled the "Victorious Leader" (Guulwade), Siad Barre fostered the growth of a personality cult. Portraits of him in the company of Marx and Lenin lined the streets on public occasions. He advocated a form of [Chinese-style Communism] based on the Qur'an and Marx, with heavy influences of Somali nationalism.
Foreign relations
Control of Somalia was of great interest to both the Soviet Union and the United States due to the country's strategic location at the mouth of the Red Sea. After the Soviets broke with Barre in the late 1970s, he subsequently expelled all Soviet advisers, tore up his friendship treaty with the Soviet Union, and switched allegiance to the West. The United States stepped in and until 1989, was a strong supporter of the Barre government for whom it provided approximately US$100 million per year in economic and military aid.
Human rights abuse allegations
Part of Barre's time in power was characterized by oppressive dictatorial rule, including allegations of persecution, jailing and torture of political opponents and dissidents. The United Nations Development Programme stated that "the 21-year regime of Siyad Barre had one of the worst human rights records in Africa."