2nd Regiment may refer to:

Active units

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British Army

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United States

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Australian Army

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French Army

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Belgian Army

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Italian Army

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Canadian Army

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Portuguese Army

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Former units

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Polish Army

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British Army

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British Indian Army

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Yugoslavia

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Greek Army

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American Civil War units

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Union Army

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Confederate Army

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American Revolutionary War units

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Spanish–American War units

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Others

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See also

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