Imperial coronation '' by
Pope Benedict VIII in 1014.
John XVIII reigned as pope from 1003 until 1009. He was succeeded by
Sergius IV from 1009 to 1012. Both John XVIII and Sergius IV, though the nominal Pope, were subservient to the power
John Crescentius. As leader of the
Crescentii clan and
Patrician of Rome, John Crescentius was the effective ruler of the city. John Crescentius' influence prevented Henry II from meeting the Pope on numerous occasions, preventing him from claiming the imperial title. Following Sergius IV's death in 1012,
Benedict VIII was elected to succeed him. Upon assuming the
chair of St. Peter, however, Benedict VIII was forced to flee Rome by
Gregory VI, an
antipope, whom John Crescentius installed as the new head of the Catholic Church. Fleeing across the Alps to Germany, Benedict VIII appealed to Henry II for protection. Henry II agreed to restore Benedict VIII to the papal throne in exchange for Benedict's coronation as emperor. Near the end of 1013, Henry II gathered his army at
Augsburg to march into Italy. Earlier in 1013, Henry signed a peace treaty with Duke Bolesław of Poland at
Merseburg. The peace with Poland allowed Henry to address affairs in Italy. On the march across the Alps, Henry was accompanied by his wife,
Cunigunde of Luxembourg, and several clerics. Upon reaching
Pavia, other bishops and abbots joined him. Henry's forces trapped the
King of Italy Arduin in his capital of
Ivrea, where he remained until 1015. Henry II arrived in Rome in early 1014 and restored Benedict VIII as pope. On 14 February 1014, the Pope crowned Henry II as
Holy Roman Emperor ("Romanorum Imperator") in
St. Peter's Basilica. In 1015, the conflict with Arduin ended when Arduin fell ill and sought peace with Henry II. He resigned the office of
Margrave of Ivrea to become a
monk in a monastery at
Fruttuaria. He died on 14 December 1015. His brief "reign" as
King of Italy would be the last time a native Italian would reign over Italy until its unification under
Victor Emmanuel II in 1861. After Arduin's death, Henry ordered the Margravate of Ivrea, which had caused the Ottonian emperors so much trouble, to be dissolved.
Third Polish War The peace agreement of 1013 between Henry II and Bolesław I of Poland quickly deteriorated. In 1014, with Henry II absent from Germany, Bolesław I sent his son
Mieszko II Lambert to the
Duchy of Bohemia to persuade the new Bohemian Duke
Oldřich into an alliance against Henry II. The mission failed, and Oldřich imprisoned Mieszko II. He was released only after the intervention of the Emperor, who, despite the planned invasion of Poland, loyally acted on behalf of his nominal vassal Bolesław I. As a result, Mieszko II was sent to Henry II's imperial court in Merseburg as a hostage. Henry II probably wanted to compel Bolesław I to appear in Merseburg and explain his actions. The plan failed, however, because, under pressure from his relatives, the Emperor soon agreed to release Mieszko II. At the same time, Henry II entertained
Yaroslav, the
pretender to the throne of the
Kyivan Rus'. A son of Kyivan Grand Duke
Vladimir the Great, he was vice-regent of the
Principality of Novgorod at the time of his father's death in 1015. Yaroslav's eldest surviving brother,
Sviatopolk I of Kyiv, killed three of his other brothers and seized power in Kyiv. Henry II's support for Yaroslav was in direct opposition not only to Sviatopolk but also to Bolesław I. Years earlier, Bolesław I had married one of his daughters to Sviatopolk, making the new Kyivan Grand Duke a son-in-law of the Polish Duke. Henry II returned to Germany in 1015 after being crowned Emperor by
Pope Benedict VIII and prepared for a third invasion of Poland. With three armies at his command, the largest contingent since the beginning of the conflict in 1004, the Imperial army simultaneously marched in a
pincer movement from the German north, south, and center. Henry II himself commanded the center army, supported by allied Slavic tribes, and moved from
Magdeburg to cross the
Oder river into Poland. Henry II was soon joined from the south by Bohemian Duke Oldřich and from the north by
Duke Bernard II of Saxony. As the Imperial army crossed the Oder River and marched across Poland, Henry II's forces killed or captured several thousand Poles, including women and children. But the Imperial army suffered heavy losses throughout the campaign. Bolesław I sent a detachment of
Moravian
knights under the command of Mieszko II in a diversionary attack against the Empire's
Eastern March. The Imperial army retreated from Poland to
Merseburg to address the assault without making any permanent territorial gains east of the Oder River. During the retreat to Germany,
Gero II, margrave of the Eastern March, was ambushed by Polish forces and killed late in 1015. Following the attack on the Eastern March, Bolesław I's forces took the offensive. Bolesław I sent Mieszko II to besiege
Meissen in 1017, then under the command of Mieszko II's brother-in-law
Margrave Herman I. His attempt to conquer the city failed, however, and he was forced to retreat to Poland. The Polish duke was able to keep the contested marches of Lusatia and Meissen on purely nominal terms of
vassalage, with Bolesław I recognizing Henry II as his feudal lord. Henry II also promised to support Bolesław I in the Polish ruler's
expedition to Kiev to ensure his son-in-law, Sviatopolk, claimed the Kievan throne. To seal the peace, Bolesław I, then a widower, reinforced his dynastic bonds with the German nobility by marrying
Oda of Meissen, daughter of the Saxon Margrave Eckard I of Meissen. Pandulf's death in 981, however, weakened Western dominance over the Byzantine Empire in southern Italy. By 982, the entire area once ruled by Pandulf had collapsed. The Byzantines still claimed sovereignty over the Lombard principalities, and the lack of a single leader to stop their advances into Lombard territory allowed them to make inroads farther north. While in Byzantine territory, Otto II encountered a large Muslim army brought into the region by
Abu al-Qasim,
Emir of Sicily, and was soundly defeated in the ensuing
battle of Stilo on 14 July 982. The defeat shifted the balance of power in southern Italy into Byzantine favor. While preparing to counterattack the Byzantine advance, Otto II suddenly died in Rome, and his infant son, Otto III, succeeded him. With an infant as ruler and a political crisis to address, the Western Empire was unable to challenge Byzantine dominance. This allowed Basil II to build up his defense forces in preparation for a future Western counterattack. In 1017, aided by
Norman mercenaries, the Lombard noble
Melus of Bari led a successful rebellion against Byzantine control of
Apulia. The Byzantine Empire struck back in 1018 under
Catepan of Italy Basil Boioannes, delivering a devastating defeat to the joint Lombard-Norman force at the
Battle of Cannae. Melus fled to the
Papal States following the defeat. With the Byzantine successes in southern Italy, Pope Benedict VIII took an unusual step in 1020, traveling north across the Alps into Germany to discuss the situation there with the Emperor. Meeting Henry II in
Bamberg, the Pope was accompanied by a large number of Italian secular and ecclesiastical leaders, including Melus. Henry II granted Melus the empty title
Duke of Apulia for his actions against the Byzantines. But Melus died just a few days later, on 23 April 1020. After settling some controversies with the bishops of
Mainz and
Würzburg, the Pope convinced Henry II to return to Italy for a third campaign to counter the growing power of the Byzantine Empire. In 1022, Henry II set out down the
Adriatic coast for southern Italy, commanding a large force. He sent
Archbishop Pilgrim of Cologne ahead with a slightly smaller army along the
Tyrrhenian littoral with the objective of subjugating the
Principality of Capua. A third army, smaller still, under the command of
Patriarch Poppo of Aquileia went through the
Apennines to join Henry II in besieging the Byzantine fortress of
Troia. Though Patriarch Pilgrim captured
Pandulf IV of Capua and extracted oaths of allegiance from both Capua and the
Principality of Salerno, all three of Henry II's armies failed to take Troia. The Byzantine troops could not be forced into a pitched battle, and Henry II was forced to turn back, his army weakened by diseases and suffering heavy losses. Henry II almost executed the treacherous prince of Capua, but he relented at the last moment at Pilgrim's pleading. Instead, Henry II sent him off to Germany in chains and appointed
Pandulf V to replace him as prince of Capua. The expedition ultimately achieved little, and Pandulf IV would be reinstated as Prince of Capua as a Byzantine ally in 1026. ==Imperial Policies==