great a part sea-power played in effecting it. Purely land
expeditions, or expeditions but slightly supported from the sea,
had ended in failure. The emperor at Constantinople still had at
his disposal a fleet capable of keeping open the communications
with his African province. It took the Saracens half a century
(647-698 A.D.) to win 'their way along the coast of Africa as
far as the Pillars of Hercules';[25] and, as Gibbon tells us,
it was not till the Commander of the Faithful had prepared a
great expedition, this time by sea as well as by land, that the
Saracenic dominion was definitely established. It has been generally
assumed that the Arabian conquerors who, within a few years of his
death, spread the faith of Mohammed over vast regions, belonged
to an essentially non-maritime race; and little or no stress has
been laid on the extent to which they relied on naval support
in prosecuting their conquests. In parts of Arabia, however,
maritime enterprise was far from non-existent; and when the
Mohammedan empire had extended outwards from Mecca and Medina
till it embraced the coasts of various seas, the consequences
to the neighbouring states were as serious as the rule above
mentioned would lead us to expect that they would be. 'With the
conquest of Syria and Egypt a long stretch of sea-board had come
into the Saracenic power; and the creation and maintenance of
a navy for the protection of the maritime ports as well as for
meeting the enemy became a matter of vital importance. Great
attention was paid to the manning and equipment of the fleet.'[26]
At first the fleet was manned by sailors drawn from the Phoenician
towns where nautical energy was not yet quite extinct; and later
the crews were recruited from Syria, Egypt, and the coasts of
Asia Minor. Ships were built at most of the Syrian and Egyptian
ports, and also at Obolla and Bushire on the Persian Gulf,' whilst