what kind of shoes did people in the civil war wear?

It would help if you could narrow it down for us. Which civil war do you mean, because, obviously footwear during the Roman Civil Wars would be very different to footwear during the Spanish Civil War.

I take it that you mean the English Civil War, then they would have worn large buckled shoes, much like the Pilgrim Father's shoes from the Mayflower.

Ankle-high "brogans", different types of boots, and moccasins all made from leather.

First source shows examples of men's shoes/boots.

Second source shows what ladies shoes looked like in the Civil War era.

Leather shoes/boots. In the military they were called Brogans.

the kind you put on your feet.