More than three and a half centuries had passed since Justinian had brought order to the chaotic Roman judicial system, and the law books were in desperate need of review. The passing years had piled on thousands of new legal decisions, adding volumes to a legal code that already had the disadvantage of being written in Latin—an impenetrably dead language now accessible only to a few antiquarians. In just two short years, the emperor managed the monumental task of translating the entire mess, systematically arranging it, and publishing the first of six condensed volumes. The unveiling of the finished work earned the emperor the nickname “Leo the Wise” and saw him hailed as the greatest lawgiver since Justinian (a fact that would have severely irked his predecessor). Those who expected him to lead the armies to equal glory, however, were soon to be disappointed. The young emperor was more of a lover than a fighter, and perhaps inevitably he proved a good deal less successful in his foreign policy than in his domestic pursuits.
Byzantium never wanted for hostile neighbors, but, at the start of Leo’s reign, it seemed as if at least the northwestern border was somewhat safe. There the Bulgar khan Boris had adopted Christianity, and many in Constantinople began to hope that the awful specter of Krum had been banished once and for all. This feeling was strengthened when Boris abdicated in favor of his youngest son, Vladimir, and retired meekly to a monastery, but no sooner had he gone than Vladimir tried to resurrect paganism, threatening to undo all of his father’s hard work. Displaying a certain lack of monastic tranquillity, the enraged Boris blinded Vladimir and put his younger sibling, Simeon, on the throne instead. The watching dignitaries of Byzantium were relieved to have a friendlier candidate in power. It was widely known that Simeon had grown up in Constantinople and was a firm Christian to boot. Here, surely, was a man who understood the civilized world and could recognize the advantages of remaining on good terms with the empire.
Perhaps that would have been the case if Leo had lived up to his nickname, but he foolishly decided to raise the import taxes on Bulgarian goods, completely ignoring Simeon’s protests. The annoyed Bulgarians immediately invaded, catching the empire by surprise, and within a matter of weeks they had swept into Thrace and had started plundering. Unfortunately for Leo, all of his armies were busy fighting in the East, so he resorted to the tried-and-true method of calling in allies to do his fighting for him. Byzantine messengers sped to the Magyars, a hostile tribe to the east of Bulgaria, inviting them to fall on the Bulgar rear. Caught in the pincer, Simeon had no choice but to withdraw and ask for peace. Leo sent his ambassadors to hammer out the details of the treaty and withdrew to deal with some Arab raiders, convinced that the chastened Bulgars had learned their lesson.
Leo may have been satisfied with himself, but Simeon had no intention of letting the matter drop. He had been outmaneuvered by the emperor, but the Bulgarian khan was a fast learner who was fully capable of employing Byzantine tactics. The moment the last imperial troop had disappeared down the road to Constantinople, he called in his own proxies, the Pechenegs—a Turkish tribe that was the natural enemy of the Magyars. Attacked from all sides, the Magyars were forced to flee, leaving Simeon free to invade Thrace once again.*
A Byzantine army tried vainly to contain the damage, but it was easily crushed, and Leo was forced to conclude a humiliating and expensive peace.The emperor had badly mishandled the situation, and when Taormina—the last Byzantine outpost in Sicily—fell to the Muslims in 902, it seemed as if the empire was once again going to slip back into weakness and enervation. Fortunately for Leo, his generals saved his military reputation in the East, where they were keeping up a steady pressure against the disintegrating caliphate. The next decade saw a surge of activity as Byzantine armies expelled the Muslims from western Armenia, destroyed the Arab navy, and raided as far as the Euphrates. There were, of course, the occasional setbacks. A major naval expedition failed to reconquer Crete, and in 904 an earthquake leveled the seawalls of Thessalonica—the second most important city of the empire. Its citizens hurried to repair the walls, but before the work was completed, an Arab fleet appeared, and the Saracens managed to batter their way inside. For an entire week, the Muslims plundered the city, butchering the old and weak before carting the rest off to their busy slave markets. The insult of Thessalonica was avenged the next year as Byzantine armies left the Arab port of Tarsus a heap of smoking ruins, but not many people were paying attention. The entire capital was gripped in the very public spectacle of the emperor’s love life.