The Siege of Jerusalem in the year 70 AD was a decisive event in the First Jewish-Roman War. It was followed by the fall of Masada in 73 AD. The Roman army, led by the future Emperor Titus, with Tiberius Julius Alexander as his second-in-command, besieged and conquered the city of Jerusalem, which had been occupied by its Jewish defenders in 66 AD. The city and its famous Temple were destroyed.The destruction of the Temple is still mourned annually as the Jewish fast Tisha B"Av, and the Arch of Titus, depicting and celebrating the sack of Jerusalem and the Temple, still stands in Rome.



Siege

Despite early successes in repelling the Roman sieges, the Zealots fought amongst themselves, lacking proper leadership. They lacked discipline, training, and preparation for the battles that were to follow.Titus surrounded the city, with three legions (V Macedonica, XII Fulminata, XV Apollinaris) on the western side and a fourth (X Fretensis) on the Mount of Olives to the east. He put pressure on the food and water supplies of the inhabitants by allowing pilgrims to enter the city to celebrate Passover, and then refusing them egress. After Jewish sallies killed a number of Roman soldiers, Titus sent Josephus, the Jewish historian, to negotiate with the defenders; this ended with Jews wounding the negotiator with an arrow, and another sally was launched shortly after. Titus was almost captured during this sudden attack, but escaped.In mid-May Titus set to destroying the newly built Third Wall with a ram, breaching it as well as the Second Wall, and turning his attention to the Fortress of Antonia just north of the Temple Mount. The Romans were then drawn into street fighting with the Zealots, who were then ordered to retreat to the temple to avoid heavy losses. Josephus failed in another attempt at negotiations, and Jewish attacks prevented the construction of siege towers at the Fortress of Antonia. Food, water, and other provisions were dwindling inside the city, but small foraging parties managed to sneak supplies into the city, harrying Roman forces in the process. To put an end to the foragers, orders were issued to build a new wall, and siege tower construction was restarted as well., by Edward Poynter (1868). Siege engines such as this would have been used by the Roman army during the attack.After several failed attempts to breach or scale the walls of the Antonia Fortress, the Romans finally launched a secret attack, overwhelming sleeping Zealot guards and taking the Fortress. This was the second highest ground in the city, after the Temple Mount, and provided a perfect point from which to attack the Temple itself. Battering rams made little progress, but the fighting itself eventually set the walls on fire, when a Roman soldier threw a burning stick onto one of the Temple"s walls. Destroying the Temple was not among Titus" goals, possibly due in large part to the massive expansions done by Herod the Great mere decades earlier. Most likely, Titus had wanted to seize it and transform it into a temple, dedicated to the Roman Emperor and to the Roman pantheon. But the fire spread quickly and was soon out of control. The Temple was destroyed on Tisha B"Av, at the end of August, and the flames spread into the residential sections of the city. The Roman legions quickly crushed the remaining Jewish resistance. Part of the remaining Jews escaped through hidden underground tunnels, while others made a final stand in the Upper City. This defence halted the Roman advance as they had to construct siege towers to assail the remaining Jews. The city was completely under Roman control by September 7 and the Romans continued to hunt down the Jews that had fled the city.