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Artillery
1861-1865
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classical Greek and Roman)
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1939-1945
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1939-1945 -- Campaigns -- Maps
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Open Parks Network
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Research from University of Oxford
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University of Washington, Seattle: Digital Collections
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Defense Technical Information Center: DTIC Technical Reports database
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Georgia State University Library Digital Collections
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Hathi Trust Digital Library
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Ike Skelton Combined Arms Research Library (CARL) Digital Library
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