Buckles?

[FiremarshalBill]

Years ago I picked up these buckles near Petersburg, VA. I have no idea if they are from a knapsack, a waist belt, a part of a horse harness, or something else. Does anyone recognize any of them? No. 12 and No. 13 photos are the same buckle from a different angle.

 

[tbuckley]

I think No. 15 is a harness buckle and the rest could have had many different uses.

 

[UCVRelics]

I have dug many of these and buckles like this were used for many purposes. Not being able to tell the size I'm going with harness buckles.