To commemorate the centennial of Americas involvement in World War I and honor the over 4 million men and women from the United States who served. This set includes a proof silver dollar and a proof silver Army Medal.
| coinage-type | Modern Commemorative |
| desg | PR |
| diameter | 38.1 |
| edge | Reeded |
| fineness | 0.9 |
| material | 90% silver; 10% copper |
| mint-mark | P,W |
| variety | World War I Centennial - Army |
| variety-2 | 2 Items (Coin, Medal) |
| weight-grams | 53.46 |
| weight-ounces | 2 |
| year-display | 2018 |