Here are 3 nice dug knives, along with the locations where they were found. I can add that the Fredericksburg knife was found in the camp of the Union 6th Corps. The Tennessee knife is rebel. (dug in rebel camp) Grand Gulf likely Union since the Confederates were holed up in Vicksburg. Top knife is thick, while the other two are thinner. Fredericksburg knife I got from "Gettysburg Relics" in Gettysburg. The Tennessee knife from "Stones River Trading Relics" in TN. Can't remember where I got Mississippi knife. The Grand Gulf is the Vicksburg campaign. Here's a chance to immediately upgrade your dug knife collection. Top to bottom - 13 inches, 15 1/2 inches, 12 1/2 inches.