Abraha (also spelled Abreha) (died after AD 553; r. 525—at least 553), also known as 'Abraha al-Ashram (Arabic: أبرهة الأشرم), was an Ethiopian general then the viceroy of southern Arabia for the Kingdom of Aksum, and later declared himself an independent King of Himyar. Abraha ruled much of present-day Yemen and Hijaz from at least 531 -547 AD to 555 - 565 AD.
Dhu Nuwas, the Jewish Himyarite ruler of Yemen, in the period c. 523-525 or c. 518-20 launched military operations against the Aksumite Christians and their local Arab Christian allies. The Aksumites in Zafar were killed, their fortresses in the Yemeni highlands destroyed, and Najran sacked.
Najran fell in 518 or 523 and many members of the Himyarite Christian community were put to death evoking great sympathy throughout the Christian regions of the Orient and prompting an Aksumite military intervention aided by a Byzantine fleet first made in 518/523.
Abraha was either one of the commanders or a member of one of the armies led by King Kaleb of Axum against Dhu Nuwas. In al-Tabari's history, 'Abraha is said to have been the commander of the second army sent by Kaléb after the first failed, led by 'Ariat.
Abraha was reported to have led his army of 100,000 men with hundreds of elephants to successfully crush all resistance of the Yemeni army and then, following the suicide of Dhu Nuwas, seized power and established himself at Sana‘a. He aroused the wrath of Kaléb, however, by withholding tribute who then sent his general 'Ariat to take over the governorship of Yemen. 'Abraha rid himself of the latter by a subterfuge in a duel resulting in 'Ariat being killed and 'Abraha suffering the injury which earned him the sobriquet of al-Asräm, "scar-face."