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Timeline of events

After losing many of their strongholds, Bar Kokhba and the remnants of his army withdrew to the fortress of Betar, which subsequently came under siege in the summer of 135. Legio V Macedonica and Legio XI Claudia are said to have taken part in the siege. According to Jewish tradition, the fortress was breached and destroyed on the fast of Tisha B'av, the ninth day of the lunar month Av, a day of mourning for the destruction of the First and the Second Jewish Temple. Rabbinical literature ascribes the defeat to Bar Kokhba killing his maternal uncle, Rabbi Elazar Hamudaʻi, after suspecting him of collaborating with the enemy, thereby forfeiting Divine protection. The horrendous scene after the city's capture could be best described as a massacre. The Jerusalem Talmud relates that the number of dead in Betar was enormous, that the Romans "went on killing until their horses were submerged in blood to their nostrils."