Statistics for occurrence #1 of “Wallachia” in chapter 9 of Colonel Theodore Lyman, With Grant and Meade from the Wilderness to Appomattox:

... him. I entertained the officer from Roumania, the one whom General Meade could not make out because he had no map of Europe. This Roumania, as I have ascertained by diligent study, is what we call Wallachia and Moldavia, and is a patch of territory lying north of the Danube, and running from its mouth, on the Black Sea, to the northwest, into the Carpathian mountains. As to the Roumanians themselves, ...
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Wallachia (Romania) 12 2 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.