Editing 853 (section)

==== Europe ====
* Danish [[Vikings]] attempt to subjugate the [[Curonians]] on the shoreline of the [[Baltic Sea]], but they are repulsed. King [[Olof (I) of Sweden|Olof]] leads Swedish Vikings in retaliation, and attacks the towns of [[Grobiņa|Seeburg]] and [[Apuolė]] (modern [[Courland]]).
* Viking marauders in [[Gaul]] sail eastward from [[Nantes]] without opposition, and reach [[Tours]]. The [[Monastery|monasteries]] at [[Saint-Florent-le-Vieil]] and [[Marmoutier Abbey, Tours|Marmoutier]] are ravaged.
* King [[Charles the Bald]] bribes [[Boris I of Bulgaria|Boris I]], ruler (''[[Khan (title)|khan]]'') of the [[First Bulgarian Empire|Bulgarian Empire]], to form an [[alliance]] against his brother [[Louis the German]], with [[Rastislav of Moravia]].<ref name='Goldberg 242'>{{harvnb|Goldberg|2006|p=242}}.</ref>
* [[Gauzbert, Count of Maine|Gauzbert]], count of [[Maine (province)|Maine]], is killed during an [[ambush]] by citizens of Nantes, in revenge for the death of [[Lambert II of Nantes|Lambert II]].<ref>''Chronique de Saint-Maixent'', p. 59. "''Gaubert, comte du Maine tomba dans une embuscade des Nantais et fut tué''".</ref>