Vespasian made a career not in the corridors of power, but as a military man – aedile and praetor under Caligula, commander of the Legion under Claudius. Then – retirement, then work as a proconsul in Africa, and in 66 ad – commander of the army in Judea.
69 ad – Vespasian is proclaimed Emperor of Rome. What would you expect from a military man in the position of Emperor – an increase in the military budget, an increase in the size of the army?
By no means, the opposite is true: when Vespasian came to power, he reduced the military expenditures of the Empire, and began with his immediate entourage – the Praetorian guard was reduced by half, and the costs of maintaining the Imperial court itself were cut.