1. tanks had genders
2. womens skin turned yellow from tnt
3. explosions in france were heard in london
4. plastic surgery was invented because of world war 1
5. the youngest british soldier was 12
6. about 12 million letters were delivered to the frontlines every week
7. germans were the first to use flamethrowers
8. the spanish flu caused about 1/3 of total military deaths
9. the total cost of WWI in the U.S was over $30 billion
10. WWI is the sixth deadliest conflict in world history
11. four empires collapsed after WWI
12. tanks were first called land ships
13. approximately 30 different poison gasses were used
14. introduced the widespread use of machine guns
15. even though the U.S government didn’t grant native americans citizenship until 1924, nearly 13,000 of them served in WWI
16. more than 200,000 african americans served in the war
17. more than 500,000 pigeons carried messages between headquarters and the front lines
18. in 1914 on christmas eve soldiers in both sides sang carols
19. WWI transformed the U.S into the largest military power in the world