World War I Bounty Claims

[Cairycat]

Anyone know what these are? On the Kansas State Historical Society's website, on the page for WWI military records, you can click on "search online index of World War I Soldiers' Discharges". Clicking that takes you to a page called "World War I Bounty Claims". Filling in my great-uncle's name, I get two listings for his name, followed by a box number. So I'm assuming that I could find this, if I were to visit the State Archives & Library (which I hope to do at some point).

I've been getting microfilms of newspapers from the KSHS, and have found out a lot looking at obits.

At any rate, if someone could give me some idea what these bounty records are, I'd be grateful.