After a lull in the military operations, owing to civil war and political turmoil in Rome, Vespasian was called to Rome and appointed as Emperor in 69. With Vespasian's departure, Titus moved to besiege the center of rebel resistance in Jerusalem in early 70. The first two walls of Jerusalem were breached within three weeks, but a stubborn rebel standoff prevented the Roman Army from breaking the third and thickest wall. Following a brutal seven-month siege, during which Zealot infighting resulted in the burning of the entire food supplies of the city, the Romans finally succeeded in breaching the defenses of the weakened Jewish forces in the summer of 70. Following the fall of Jerusalem, in the year 71 Titus left for Rome, leaving Legion X "Fretensis" to defeat the remaining Jewish strongholds including Herodium and Machaerus, finalizing the Roman campaign in Masada in 73–74.