John had given strict orders to his men to keep together in their companies, each under his commander; and not to try to maintain regular order as one band, for this would be next to impossible, fighting on such hilly and broken ground. Besides, they would be sure to get mixed up with the masses of Simon's troops.
At the same moment that Simon's force poured through the northeastern gate, that of John of Gischala issued from the Temple platform and, in rivalry with each other, both dashed down the steep declivity into the bottom of the Valley of Jehoshaphat, and then climbed the sharp slope of the Mount of Olives. Then with loud shouts they fell, in wild disorder, each as he reached the spot, upon the Tenth Legion.
The Romans, anticipating no attack, and many of them unarmed as they worked at the intrenchments, were unable to resist the fierce onslaught. Accustomed to regular warfare, this rush of armed men from all sides upon them surprised and disconcerted them. Every moment added to the number of their assailants, as fresh combatants continued to pour out from the city and, fighting stubbornly and sullenly, the Romans were driven out of their half-formed intrenchments up the slope, and over the crest of the Mount of Olives.
The Jews fought, regardless of life. Single men dashed into the midst of the Romans and fell there, fighting fiercely. John's compact companies hurled themselves upon the line, and broke it. Simon fought desperately at the head of his men, cutting down all who stood in his way. The Romans were wavering, and would soon have broken into open flight, when rescue arrived. The general in command had, immediately the Jews had been seen issuing out, sent off a horseman to Titus with the news; and he, putting himself at the head of his bodyguard, started instantly to their assistance.
Falling suddenly upon the flank of the Jews, he bore them down by the impetuosity and weight of the charge. In vain, Simon and John of Gischala tried to rally their men; and John's bands, gathering round him at the sound of his bugle, opposed a firm and steady resistance. The Roman legion rallied and, ashamed of having been driven back before the very eyes of Titus, attacked the Jews with fury; and the latter were driven down the hill into the valley.
Here, John's band refused to retire further. Simon and John of Gischala rallied their troops, and an obstinate contest ensued; the Romans being unable to push the Jews farther back, now that the latter were, in turn, fighting with the ground in their favor. For some time the battle raged. Then Titus, seeing that he could not drive the Jews back into the city, ordered a portion of the Tenth Legion to reascend the Mount of Olives, and complete the work of fortifying their camp; so that, at the end of the day, the legion could fall back to a place of safety.
The watchman on the wall saw the movement, and thought that the Romans were retreating. He waved his mantle wildly and, at the signal, the Jews again burst down upon their foes, and fresh forces poured down from the gates to their assistance. In vain, the Roman line tried to hold the bottom of the valley. The Jews burst through them, and drove them in disorder up the hill; Titus alone, with a few followers, making a stand on the lower slopes. The Jews, rushing on, surrounded his party and fell upon him from all sides, while their main body swarmed up the hill, and the Romans, panic stricken, dispersed in all directions.
Victory seemed in the hands of the Jews, when some of the Romans discovered that Titus was not with them; but was cut off, and surrounded, at the bottom of the hill. They shouted to others, and the news rapidly spread through the fugitives. Overwhelmed with shame at having deserted their general, and knowing the severe punishment which, according to Roman military law, would befall them for their cowardice, the Romans paused in their flight.
Their discipline came to their aid, and they quickly fell in, in companies and, with a shout of fury, advanced upon the scattered Jews; who, although vastly superior in numbers, had no order or formation which would enable them to resist the downward impetus of the solid masses of heavy-armed Romans. Again they were driven down the hill; and the Romans, pressing upon them, found to their delight that Titus and his band had successfully resisted the attacks of their foes.
The Jews were driven some distance up the side of the slope; and there the combat was renewed until, seeing that they could make no further impression upon the enemy, the Jews retired sullenly through their gates into the city. They were, however, well satisfied with their day's work. Numbers had fallen, but they had inflicted heavy loss upon the Romans. They had forced one of the legions to retreat, in fair fight; had all but captured Titus; and had proved, to the Romans, the formidable nature of the task they had undertaken.