Lawrence believed the very qualities that made the tribesmen such poor material for conventional warfare could help them defeat the Turks: swift mobility, hit-and-run tactics, a gift for long-range sniping, and a tradition of mounted raids that took an enemy by surprise, after which the raiders vanished back into the desert with their plunder. Fighting as guerrillas in small numbers they could deliver an endless series of pinpricks rather than a smashing blow, and over time the pinpricks might prove fatal for the enemy. As for the “leader with a genius for war,” there seems little doubt from Lawrence’s reports that he already saw himself in that role.

The next morning Lawrence was disagreeably surprised to learn that it was not just Zeid who had been defeated. Feisal and his army had clashed with the Turks too, in exactly the kind of conventional battle that Lawrence believed the Arabs should avoid, and had been badly beaten. Zeid’s sudden defection had exposed Feisal’s untrained and poorly organized tribesmen to a determined Turkish attack. Feisal tried to get his men to stand and fight at Nakhl Mubarak, but they were overcome by Turkish artillery, as well as by the fact that their antiquated guns (Lawrence called these guns “old rubbish” left over from the Boer War) proved not to have the range of the Turkish artillery—nor had they been supplied with sights, range tables, or even reliable ammunition. As a resultthe men of the Juheina tribe, on Feisal’s left, lost heart quickly and fled the battlefield. The Juheina would later claim that they had merely been tired and thirsty and had needed a coffee break, but in any case their flight led to the rapid collapse of the rest of Feisal’s line and a disorderly rout as the entire army raced back toward Yenbo and the protection of the British naval guns.

For a western army this would have been a disgrace, and would have been followed by severe disciplinary measures and perhaps courts-martial for the senior officers; but when Lawrence reached Feisal’s house in Yenbo, he found the emir and his commanders in a jolly mood, trading insults, and taunting Zeid in a good-natured way for the speed with which he and his men had run away from the battle. Zeid and his men were “quiet, but in no other way mortified by their shame,” Lawrence remarked; nor did Feisal seem dismayed by the collapse of his army in the face of only three battalions of Turks—in numbers, less than half the fighting men Feisal had. This incident fully justified Colonel Callwell’s firmly expressed opinion in Small Wars: “While all goes well, irregular forces hold together and obey their chiefs, but in the hour of trial the bonds which keep the mass intact are apt to snap, and then the whole dissolves and disappears.”

Feisal’s only concern was that the Juheina tribesmen on his left, who had fled from the battlefield when the fragile bonds that tied them to him snapped, might have gone over to the enemy. But when this turned out not to be the case—they were guilty of cowardice, but not betrayal—the Juheina were given a chance to make up for their ignominious flight by going forward to harass the Turks’ line of communications with sniper fire, a logical decision, since this was their country and they knew the best places to shoot from.

Hoping that this might at least slow the Turks, Feisal and Lawrence went out to see how the town might be saved. Yenbo, fortunately, lent itself to defense—the town was built on a coral reef that rose some twenty feet above sea level, surrounded on two sides by water, and on the other two sides by wide, flat stretches of glistening sand and salt, with no drinkable water to be had on them. The Arabs’ dislike of manual labor did not need to be confronted, since the ground was coral, and far too hard to dig in—instead Lawrence and Garland reinforced the existing walls, and placed the Egyptian gunners and naval machine gun parties at the crucial points. Boyle had managed to produce five naval ships and anchored them close inshore; they included the modern, powerful shallow-draft monitor M 31, whose six-inch guns would surely stop any Turkish attempt to rush the town across the salt flats. Navy signalers were placed in the minaret of the mosque, with Feisal’s blessing on this intrusion by infidels, to direct the fire of the ships’ guns.

At dusk, silence fell on the town as Feisal’s men waited for the attack—by that time the Turks were only three miles away—but none came. After darkness had fallen, the ships turned on their searchlights and aimed them at the wide salt flats, illuminating the flats harshly in a careful crisscross pattern through the night. The commander of the Turkish advance hesitated at the sight of the brightly lit landscape, and lost heart at the prospect of advancing across brilliantly lit open ground as flat as a billiard table, toward an enemy holding the high ground. The night passed without a Turkish attack, or a gun’s being fired.

Lawrence was sufficiently confident of the outcome—and exhausted—that he went aboard the Suva and fell asleep. He would later conclude that the Turks’ failure to rush Yenbo that night “and stamp out Feisal’s army once and for all” had cost them the war.

For the moment, however, the Turks still held Gaza on their right and Medina on their left, and threatened Mecca. The Arab army had been saved, but the Arab cause was in as precarious a situation as ever. Feisal—with the help of lavish supplies of British gold—had kept his army together, but only under the protection of British warships; what it needed was a strategy, and Lawrence was about to provide one.

Until now, Lawrence’s role had been that of an observer and a liaison officer, but those limits were about to be changed rapidly. At home, the energetic David Lloyd George had replaced the exhausted Asquith asprime minister. Lloyd George was by instinct an “easterner”: he deeply distrusted the idea that the war could be won only by breaking through the German lines on the western front whatever the cost in British and French lives, and his notoriously devious mind was attracted to the notion of knocking Germany’s weakest ally out of the war and rearranging the Middle East. In London, Cairo, and Khartoum the decision was finally made that the Arabs simply could not be allowed to fail. In Mecca Sharif Hussein still vacillated, alternately calling Colonel Wilson in Jidda to request British troops and then changing his mind and refusing permission for them to land, while Colonel Brйmond schemed to get his French North African troops into the Hejaz. With the sharifian forces more or less bottled up on the coast in Rabegh and Yenbo under the protection of the Royal Navy there seemed nothing much they could do to keep the tribes from deserting, one by one.

Lawrence was among those who saw that it was necessary to go on the offensive, rather than sit and defend coastal enclaves. As long ago as October 1916 Feisal had considered moving the Arab base of operations to Wejh, 180 miles north of Yenbo, but he had hesitated, reluctant to put too much distance between his army and Mecca. In addition, moving the Arab army out of one tribal area to another produced endless difficulties, and exposed it to attacks from the Turkish garrison in Medina. Lawrence dismissed such doubts; he was determined to launch the Arab army out into the desert and cut it free from its own bases on the Red Sea. He came up with a strategy, leading Liddell Hart to declare that “the military art was one in which [Lawrence] attained creativeness” and to compare Lawrence to Marlborough, Napoleon, Sherman, and Stonewall Jackson. Lawrence wanted Abdulla to take his army of 5,000 men deep into the desert fifty miles north of Medina, and base it there around the wells of the fertile Wadi Ais, from which position he could threaten the railway line to Medina and at the same time cut off caravans arriving from central Arabia. This would deflect the attention of the Turkish commander Fakhri Pasha from any attempt to take Rabegh or Mecca, and also screen from him Feisal’s line of march as Feisal took his army north to Wejh. Insteadof being spread out south of Medina but unable to take it, the Arabs would then be well to the north of Medina, able to cut off its supply line at any time. If they could take Aqaba as well, they would be free to move farther north across the empty desert toward Amman and Damascus, and the huge political prize that Syria represented.