In 25–24 , the Roman emperor attempted to conquer the Sabaean kingdom, which was the southernmost outlet of the trade route to India.
At that time, caravan traffic became less important than the shipping route between Egypt and India.
The capital is Sana'a, and Aden is referred to as the country's economic capital.
There are salt deposits near Shabwa, Safir, and Harib.
Inhabitants feel that they have a common culture, although local and class identities are still important. Medieval Arab geographers thought of Yemen as covering the entire southern strip of the Arabian peninsula, from the mountainous southwest, including Najran and Asir, to Hadhramaut and Oman on the east.
Today that area includes the regions that make up the Republic of Yemen (RY), which was formed in 1990 when the Yemen Arab Republic (YAR, or North Yemen) with its capital in Sana'a, and the People's Democratic Republic of Yemen (PDRY, or South Yemen), with its capital in Aden, were unified.
Ancient South Arabian culture developed an intricate architecture and created masterpieces of figurative and decorative arts.
It maintained contacts with Egypt, Greece, Palmyra, Chaldea, and Abyssinia, which was founded by Sabaeans, as well as India.
The name of the country is derived from the legendary ancestor Yaman, the son of Qahtan, or from the Arabic root ymn ("the right") since Yemen is located to the right of the Meccan sanctuary of Kaaba.