For the economics of the Second Temple, see, most recently, Sanders, Judaism: Practice and Belief 63 B.C.E.-66 C.E., pp. 146–169; for attendance at festivals, see Sanders, pp. 125–145. Josephus mentions the extra troops in Jewish War 2:12, 1. For Caligula, see Philo, Legation to Gaius 30:203–42:337; cf. Josephus, Antiquities 18:8, 2 and Jewish War 2:10, 2–5.