Help with military buckle + another

[Goldstar1]

Can anyone help ID this buckle and another piece both brass or copper , found right next toeach other along with some brass / copper rivets and a few 45 schofield cartridges . The area had a small military encampment in the late 1800s . Any Help is most appreciated.

 

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[Hawks88]

Nice saves. Sorry I can’t help with the ID.

 

[HuntinDog]

Your buckle is a tensioning buckle and the other piece is mounted to something for the strap to run through and keep in place.
Great finds

 

[Tony in SC]

The thing with two holes is a strap retainer/guide. Could be from a chest, cargo wagon, baggage rack, etc.