Cassius Dio on Bar Kochba

Simon ben Kosiba, surnamed Simon bar Kochba ("son of the star") was a Jewish Messiah. Between 132 and 135, he was the leader of the last resistance against the Romans. After the end of the disastrous rebellion, the rabbis called him "Bar Koziba", which means "son of the lie".

A very important source is Cassius Dio (164-c.235), a Roman senator who wrote a Roman History that may be considered as the best ancient book on the subject. He usually knows how to find good sources, and even though we do not know what are his sources on Bar Kochba, we may trust his words.

Sections 69.12-14 were translated by E. Cary.

Book
69
Chapter
12
13
14
Section
1
2
3

Cassius Dio on Bar Kochba

[69.12.1] At Jerusalem, Hadrian founded a city in place of the one which had been razed to the ground, naming it Aelia Capitolina, and on the site of the temple of the [Jewish] god, he raised a new temple to Jupiter. This brought on a war of no slight importance nor of brief duration, 


[69.12.2] for the Jews deemed it intolerable that foreign races should be settled in their city and foreign religious rites planted there. So long, indeed, as Hadrian was close by in Egypt and again in Syria, they remained quiet, save in so far as they purposedly made of poor quality such weapons as they were called upon to furnish, in order that the Romans might reject them and they themselves might thus have the use of them. But when Hadrian went farther away, they openly revolted.


[69.12.3] To be sure, they did not dare try conclusions with the Romans in the open field, but they occupied the advantageous positions in the country and strengthened them with mines and walls, in order that they might have places of refuge whenever they should be hard pressed, and might meet together unobserved under ground; and they pierced these subterranean passages from above at intervals to let in air and light.