Statistics for occurrence #1 of “Captain Thyssens” in chapter 5.68 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 3.:

...on the 14th. Meantime General Pemberton had left Jackson and gone to Vicksburg. The writer followed him, after having laid out a line of defenses around Jackson, leaving them to be constructed by Captain Thyssens . General Pemberton first thought that Grant would turn north from Port Gibson and try to force a passage across Big Black River at one of the ferries. He accordingly sent about a brigade eachtoHank...
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