In military terms, 91st Brigade may refer to:
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91st Mixed Brigade
The 91st Mixed Brigade was a unit of the Spanish Republican Army that took part in the Spanish Civil War. Throughout the war the brigade was present on the Extremadura front, attached to the 37th Division.
History
The unit was created in Ma ...
(Spain)
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91st Brigade (United Kingdom)
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91st Engineer Brigade (Soviet Union)
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