How greatly--how dangerously--Augustus had reduced the size of the army may be seen from the fact that there were at least fifty legions during the civil wars, and only twenty-five at the death of Augustus. These troops were for the most part stationed along the northern and eastern frontiers. In Spain 3 legions Lower Germany 4 ” Upper Germany 4 ” Pannonia 3 ” Dalmatia 2 ” Mœsia 2 ” Syria 3 ” Egypt 3 ” Africa 1 ” To these must be added the 9000 men of the prætorian guard, who enjoyed shorter service (sixteen years) and double pay. The prætorians had to be genuine Italians, and when inside the walls of Rome wore civilian dress. There were also three “urban cohorts” as police--a new and most salutary invention--and a “cohort of watchmen” for the prevention of fire. Obviously with a service of twenty-five years there could be no reserve. But some of the veterans of the prætorian guard were used as paymasters or engineers. There were also colonies of time-expired soldiers planted as garrisons in dangerous country. The legions themselves were stationed in great fortified camps along the frontiers of their various provinces. There were thus huge spaces of country totally without military forces. For warfare on the shores of the Black Sea troops had to be summoned from Syria. There was no such thing as a readily mobilised striking force in Italy. This was an inconvenience and a danger, but Augustus did not mean to organise a military monarchy. Professor Gardthausen has a clever comparison of the problems before the Roman army with those that face the British Empire. The problems were remarkably similar, for greater speed of transport counteracts the greater distances. Both peoples made great use of the system of drilling native troops and expecting provinces to guard themselves. But the Romans would have been saved much trouble if they had been able to adopt our system of a compact and highly trained expeditionary force backed by a citizen army for home defence. To be sure, the Romans now lived in a state of peace far more profound than any that the world has enjoyed before or since. Their wars were of their own making. Within the circle of the armed frontiers Pax Romana reigned supreme. The Roman citizens hung up their swords for ever.