Note: Its strategic location and excellent harbor have made Aden an important trading center of southern Arabia since ancient times, as well as a coveted conquest.
Now the Republic of Yemen. Yemen is at the mouth of the Red Sea, in the southwestern corner of the Arabian Peninsula, bordered by Saudi Arabia to the north and Oman to the east; formerly divided into North Yemen (the Yemen Arab Republic) and the People's Democratic Republic of Yemen.
Note: Northern Yemen became an independent country after World War I.
Note: Southern Yemen won independence from Britain in 1967 and became the world's only communist Arab state.
Note: The two Yemens were reunified as a result of the democratic reforms of the Soviet Union and its satellite countries in 1990.