appear, is in truth a mutilated ruin, like an aqueduct on the Campagna, arches striding, and then, abruptly, fields. The Romans themselves had always dreaded that this might be their destiny. As Sallust, their first great historian, put it, ‘there can be no doubting that Fortune is the mistress of all she surveys, the creature of her own caprices, choosing to broadcast the fame of one man while leaving that of another in darkness, without any regard for the scale of what they might both have achieved’. 5 Ironically, the fate of his own writings was to illustrate this bitter reflection. A follower of Caesar, Sallust composed a history of the years immediately preceding his patron’s rise to power, a work unanimously praised by its readers as definitive. Had it only survived, then we would have had a contemporary’s account of a decade, from 78 to 67 BC , rich in decisive and dramatic events. As it is, of Sallust’s masterwork, only scattered fragments remain. From these, and from other scraps of information, a narrative may still be reconstructed – but what is gone can never be repaired.
No wonder that classicists tend to be nervous of sounding overly dogmatic. Write so much as a sentence about the ancient world and the temptation is immediately to qualify it. Even when the sources are at their most plentiful, uncertainties and discrepancies crop up everywhere. Take, for example, the celebrated event after which this book is titled. That the crossing happened as I described it is probable but by no means certain. One source tells us that the Rubicon was forded after sunrise. Others imply that the advance guard had already passed into Italy by the time that Caesar himself arrived on the river’s bank. Even the date can only be deduced from extraneous events. A scholarly consensus has formed around 10 January, but any date between then and the 14th has been argued for – and besides, thanks to the vagaries of the pre-Julian calendar, what the Romans called January was in fact our November.
In short, the reader should take it as a rule of thumb that many statements of fact in this book could plausibly be contradicted by an opposite interpretation. This is not, I hasten to add, a counsel of despair. Rather, it is a necessary preface to a narrative that has been pieced together from broken shards, but in such a way as to conceal some of the more obvious joins and gaps. That it is possible to do this, that a coherent story may indeed be made out of the events of the Republic’s fall, has always been, to the ancient historian, one of the great appeals of the period. I certainly see no reason to apologise for it. Following a lengthy spell in the dog-house, narrative history is now squarely back in fashion – and even if, as many have argued, it can only function by imposing upon the random events of the past an artificial pattern, then that in itself need be no drawback. Indeed, it may help to bring us closer to the mindset of the Romans themselves. Rare, after all, was the citizen who did not fancy himself the hero of his own history. This was an attitude that did much to bring Rome to disaster, but it also gave to the epic of the Republic’s fall its peculiarly lurid and heroic hue. Barely a generation after it had occurred, men were already shaking their heads in wonderment, astonished that such a time, and such giants, could have been. A half-century later and the panegyrist of the Emperor Tiberius, Velleius Paterculus, could exclaim that ‘It seems an almost superfluous task, to draw attention to an age when men of such extraordinary character lived’ 6 – and then promptly write it up. He knew, as all Romans knew, that it was in action, in great deeds and remarkable accomplishments, that the genius of his people had been most gloriously displayed. Accordingly, it was through narrative that this genius could best be understood.
More than two millennia after the Republic’s collapse, the ‘extraordinary