(type Temple and cross) of Charles the Bald, minted at
Reims between 840 and 864 (pre-
Edict of Pistres) (c. 870), thought to possibly depict Charles the Bald Shortly after Verdun, Charles conducted an unsuccessful campaign against Brittany. On his return, he signed the
Treaty of Coulaines with his nobility and clergy. After that, the first years of his reign, up to the death of LothairI in 855, were comparatively peaceful. During these years the three brothers continued the system of "confraternal government", meeting repeatedly with one another, at
Koblenz (848), at
Meerssen (851), and at
Attigny (854). In 858, Louis the German, invited by disaffected nobles eager to oust Charles, invaded the West Frankish kingdom. Charles was so unpopular that he was unable to summon an army, and he fled to
Burgundy. He was saved only by the support of the bishops, who refused to crown Louis the German king, and by the fidelity of the
Welfs, who were related to his mother, Judith. In 860, he in his turn tried to seize the kingdom of his nephew,
Charles of Provence, but was repulsed. On the death of his nephew
LothairII in 869, Charles tried to seize Lothair's dominions by having himself consecrated as King of
Lotharingia at
Metz, but he was compelled to open negotiations when Louis found support among Lothair's former vassals. Lotharingia was partitioned between Charles and Louis in the resulting
treaty (870). Besides these family disputes, Charles had to struggle against repeated rebellions in Aquitaine and against the
Bretons. Led by their chiefs
Nomenoë and
Erispoë, who defeated the king at the
Battle of Ballon (845) and the
Battle of Jengland (851), the Bretons were successful in obtaining a
de facto independence. Charles also fought against the
Vikings, who devastated the country of the north, the valleys of the
Seine and
Loire, and even up to the borders of Aquitaine. At the Vikings' successful
siege and sack of Paris in 845 and several times thereafter Charles was forced to purchase their retreat at a heavy price. Charles led various expeditions against the invaders and, by the
Edict of Pistres of 864, made the army more mobile by providing for a
cavalry element, the predecessor of the French
chivalry so famous during the next 600 years. By the same edict, he ordered fortified bridges to be put up at all rivers to block the Viking incursions. Two of these bridges at Paris saved the city during its
siege of 885–886. Charles engaged in diplomacy with the
Emirate of Cordoba, receiving camels from
Emir MuhammadI in 865. From the 860s, the palace of
Compiègne became an increasingly important centre for Charles and he founded a monastery there in 876. In the tenth century Compiègne was known as 'Carlopolis' because of its association with Charles. In 871–872, Charles sent two letters to
Pope HadrianII where he made a defence of royal sovereignty in the face of intrusive actions by the papacy into state affairs. ==Reign as emperor==