The Battle of Acronis or Acroënus was the opening engagement of the punitive expedition of Manuel I Komnenos in 1146, during which the Byzantines surprised and engaged a Seljuk raiding force, ultimately achieving victory.
Background In spring (1145), Manuel aborted his first expedition due to an illness of his sister (Maria Komnene) or either being ill himself, upon learning of his withdrawal, the Sultanate of Rum led by Sultan Mesud I assumed that the byzantines were having internal problems which emboldened them to persistently launch border incursions and plundering raids within the newly secured border frontier, provoking and alarming Manuel to conduct a retaliatory expedition the following year.
Battle In the spring of 1146, Manuel mobilized a large force at the strategic base of Lopadion, after which he advanced to Akroinon. Here, the Emperor encountered a Seljuk raiding army which he engaged in a pitched battle. After fierce fighting, during which Manuel was wounded when a Seljuk arrow struck his foot, the Byzantines defeated the Seljuks and conducted a sharp pursuit of their retreating horsemen.Deeds of John and Manuel Comnenus [Byzantine History, 1118-1180
Aftermath
With the path cleared, Manuel advanced on the fortified town of Philomelion; where he defeated the local garrison there capturing and sacking the city where he also resettled the remaining Christian Greek inhabitants to western Anatolia.Magdalino, Paul, The Empire Of Manuel I Komnenos, 1143 1180, p. 42Zeki Atçeken & Yaşar Bedirhan, p. 212
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