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During the 11th and 12th centuries , this precise arrangement is no longer in evidence ; instead , stratopedarchēs was one of the official titles of the commanders-in-chief of the Byzantine army , and is amply attested in seals .
 Byzantine army
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Byzantine army