(right), with the Abbot of
Mont Saint-Michel (middle) and Lothair (left). The guardianship of Archbishop Bruno of Cologne lasted until 965 and oriented Lothair towards policy of submission towards
East Francia, which was evolving into the German
Holy Roman Empire. Despite his youth, Lothair wanted to rule alone and reinforced his authority over his vassals. This desire of political independence led to a deterioration in relations between the King and his maternal relatives and a struggle with the new Holy Roman Empire. Despite this, Lothair wanted to maintain ties with Emperor
Otto I by marrying Princess
Emma of Italy (the only daughter of Empress
Adelaide of Burgundy – second wife of Otto I, from her first marriage with King
Lothair II, member of the
Bosonids dynasty In 962
Baldwin III, Count of Flanders, son, co-ruler, and heir of
Arnulf I, Count of Flanders died and Arnulf bequeathed Flanders to Lothair. On Arnulf's death in 965, Lothair invaded Flanders and took many cities, but was eventually repulsed by the supporters of
Arnulf II, Count of Flanders. He temporarily remained in control of
Arras and
Douai. Lothair attempted to increase his influence in the
Lotharingia, once held by his family, and in turn
Emperor Otto II encouraged resistance to Lothair's overtures. In 976 the brothers
Reginar IV, Count of Mons and
Lambert I, Count of Louvain, after being dispossessed from their paternal inheritance by Emperor
Otto II, made an alliance with
Charles (King Lothair's younger brother) and
Otto, Count of Vermandois and with an army they marched against the Imperial troops. A great battle, which remained undecided, took place in
Mons. Although Lothair secretly encouraged this war, he did not intervene directly to help his brother. Charles took advantage of the situation and established himself in Lotharingia. His main interest was to break the harmony between Lothair and the
House of Ardennes, loyal to Emperor Otto II and very powerful in Lotharingia and to which belonged both the Chancellor-Arbishop
Adalberon of Reims and his namesake Bishop
Adalberon of Laon. In 977, Charles accused Queen Emma of adultery with Bishop Adalberon of Laon. The Synod of Sainte-Macre, led by Archbishop Adalberon of Reims, took place in Fismes to discuss the matter. Due to a lack of evidence, both the Queen and Bishop were absolved, but Charles, who maintained the rumors, was expelled from the kingdom by Lothair. The House of Ardennes and the
Lotharingian party, who were favorable to an agreement with Otto II, seemed all-powerful at the court of Lothair. Otto II, however, committed the mistakes of restoring the
County of Hainaut to Reginar IV and Lambert I, and of appointing Charles as Duke of Lower Lorraine, a region corresponding to the northern half of Lotharingia, separate from the Upper Lotharingia since the late 950. Rewarding Charles, who had questioned the honor of the wife of the King of the Franks, was a way to offend the King himself. ==War with the Holy Roman Empire==