Yemen Region (Arabic: إقليم اليمن, romanized: Eglîm el-Yemen) also known as South Arabia is a geographic term denoting territories of historic South Arabia which included All lands between the Gulf of Oman in the east and the Red Sea.

The term 'Yaman' appears to have originated at the time of Islam and has, in Arabic usage, covered a wide range of the west and south of the Arabian Peninsula, from the region south of Mecca and Medina to what is now Oman.

In pre-Islamic times the settled south-west Arabian region was known named after the Kingdoms, Saba and Himyar established there.

British control of Aden was also challenged by his successor King Ahmad bin Yahya who did not recognise British suzerainty in South Arabia and also had ambitions of creating a unified Greater Yemen.

In the late 1940s and the early 1950s, Yemen was involved in a series of border skirmishes along the disputed Violet Line, a 1913 Anglo-Ottoman demarcation that served to separate Yemen from the Aden Protectorate.