Having dug quite a few cw horse shoes (which I normally hang on a tree when i find them in the woods) I don't call myself a expert on horse shoes but I have learned quite a bit about them.. "Burden Iron Works" made millions of Civil War "machine made" horse shoes for the union and the horse shoes they made (if you ever dug one you can tell) were the best of quality, using the most potent iron of this earth, there machine made horse shoes to this day - if you dig one you would need a jaw of life to bend them, while a confederate horse shoe was basically hand forged and crumble in your hands when you dig one up in todays time.. The horse shoe you have look like they were hand forged - which during the mid 19th century that was common to have most iron in the South hand-forged and not machine made during the war period, up in the North they had much more machine made products... I would date these two horse shoes you dug from sometime in the late 19th c to the early 1900s, but depending on how good the soil is to artifacts they could date to the mid 19th c., so i guess really who is to say these can't date to the cw era? if not by a soldier by a civilian..