Lot of Military Uniform Memorabilia Collectibles Buttons, Buckle, Bars

This listing is for tall the item photographed: 3 WWI uniform buttons, 2 private stripes, belt buckle. I’m not sure about the significance of the belt buckle, it was with the rest of these things in an old box at an estate sale in Biloxi, Mississippi. The buttons are from Newark, NJ , and Philadelphia, PA, from 3 different button companies. The stripes look like army private stripes, but im not an expert by any means. I researched these items and added any info I found that may be of importance. Thanks for looking!