During World War I, 316 Citadel graduates served in Europe. A contingent of Citadel Alumni that made up an artillery brigade was on the first American convoy to sail to the battlefield (June 13, 1917) eventually firing America's first shot into German lines.
The entire Citadel Class of 1917 eventually served in the armed forces. Ten Citadel graduates (listed below) made the ultimate sacrifice. The number of Alumni killed on the battlefield is unknown.
| Class | Rank, Name, Unit | Battle | Death Date |
|---|---|---|---|
| 1890 | Lt. Col. William Howe Simons | KIA, France | 1918 |
| 1908 | Maj. Robert Henry Willis, Jr. (Aircorps) | KIA, France | September 13, 1918 |
| 1909 | 1/Lt. W. A. Mulloy | KIA, France | 1918 |
| 1912 | Lt. William Montague Nichols (British Artillery) | KIA, Flanders Field, Fr. | March 29, 1905 |
| 1914 | Lt. John Hodges David (18th Inf.) | KIA, Ansauuile, Fr. | April 1, 1905 |
| 1915 | Cpt. James Hill Holmes (USA) | KIA, Soissons, Fr. | July 19, 1918 |
| 1916 | Cpt. Julius Andrew Mood, Jr. (USA) | KIA, Soissons, Fr. | July 21, 1918 |
| 1916 | Lt. George Hampton Yarborough, Jr. (USMC) | KIA, Belleau Woods | June 23, 1918 |
| 1917 | Robert James Cochran | KIA, France | October 1918 |
| 1917 | Arthur Thomas Elmore | KIA, Belleau Wood, Fr. | June 24, 1918 |
