Statistics for occurrence #1 of “South Anna rivers” in chapter 9 of General Horace Porter, Campaigning with Grant:

... spoke of the Union forces as being east of that river, and was hurrying forward troops in order to prevent Grant from crossing the Pamunkey, a stream formed by the junction of the North Anna and the South Anna rivers , while Grant was in reality moving toward the North Anna. In these movements Lee was entirely outgeneraled. On the morning of May 22 Hancock was instructed to remain at Milford during the day,...
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