72
THE CIVIL WARS
professing themselves scandalized by the godless luxury of the court
of Damascus, and the city exploded into open rebellion. Yazid
hesitated no longer and sent an army into Arabia; the insurgents
were routed, the Syrian troops entered Medina (August, 683), the
city of the Prophet was delivered to military punishment, and the
Omayyads might seem to have avenged at last the blood of the
murdered Othman. The army then moved on Mecca to deal with
Abdallah. Fighting broke out, in the course of which, to the horror
of pious believers, the Kaaba caught fire and the sacred black stone
burst from its socket. Abdallah and Mecca were saved, however,
by the death of Yazid (November 683), which threatened the total
ruin of the Omayyad cause. Yazid’s son Mu’awiya II, a sickly
youth, was proclaimed Caliph, but died in a few months, and the
line of Abu Sufyan became extinct. To a disputed succession was
now added a new source of discord, the famous conflict between
the Kalb and the Kais (Qays), the Arabs of the south and north.
Far back in pre-Islamic times the Arab tribes, as we have seen,
traced their descent either from Adnan or from Kahtan. Adnan was
the father of the northern branch of the race, the most noteworthy
tribe of which was the Banu-Mudar, who settled along the
Euphrates and one of whose clans, the Kais, often gave their name
to the whole group. The southerners, the supposed progeny of
Kahtan, were commonly called Yemenites; many had migrated to
the north and settled in Syria, among them the Banu-Kalb, whose
name was in time taken as a rallying cry for their party. Rivalry
between the Kais and the Kalb was ancient and endemic; partly
masked by the coming of Islam, which tried to substitute the bond
of religion for that of race, it broke out afresh when Yazid, the son
and husband of Kalbite women, was accused of favouring the
southerners. Dahhak b.Kais, the head of the Kaisite clan, who had
loyally served Mu‘awiya and had been rewarded with the
governorship of Damascus, deserted the Omayyad cause and
acknowledged Abdallah as Caliph. The defence of the Omayyad
fortunes had devolved on Marwan b.al-Hakam, a cousin of
Mu‘awiya and Yazid, and an elderly man of nearly seventy, who
might have given up all claim to the Caliphate had not the tough
Ubaid Allah urged him to make a stand, collect an army at Jabiya,
and from that base march on Damascus. The Kalbites rallied to his
support, and the Kaisites were beaten at Marj Rahit, a plain