The Battle of Ane (Dutch Low Saxon:Slag bi'j Aone, Dutch:Slag bij Ane), was fought in 1227 between Otto II of Lippe, Bishop of Utrecht, and Rudolf II van Coevorden with his army of Drenths. The account of the battle comes from Quedam narracio de Groninghe de Trentis de Covordia et diversis aliis sub episcopis traiectensibus ("A narrative of Groningen and Drenthe and various other things under the Bishops of Utrecht"), a manuscript from the early 13th century.
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