| His work in Cambridge was interrupted by World War I when he worked on the land rather than join the army. |
| The effort to achieve more accurate weapons began in World War I and approached modern capabilities with PGMs toward the end of the Vietnam War. |
| After World War I they were less sanguine about progress and more inclined to the hereditarian pessimism of eugenics. |
| The roots of sweet music grew from the post World War I urban craze for large dance halls and for dancing in hotel ballrooms and private clubs. |
| In Portland, Maine, they till proudly point to Baxter Boulevard, where 400 linden trees were planted in 1921 as a memorial to World War I vets. |
| The army that fought World War I was composed of regulars, National Guardsmen, and individual volunteers. |
