Assertion: rifle | /r/ObjectUse | used by skirmisher
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Source sentences:
text: From around 1750, rifles began to be used by skirmishers (Frederick the Great raised a Jäger unit in 1744 from game-keepers and foresters, armed with rifles), but the very slow rate of fire of muzzle-loading rifles restricted their use until the invention of the Minié ball in 1849, ending the smoothbore musket era.