Is War Horse set in ww1 or ww2?

Related questions

1. What was Hitler's role in World War Two?
2. What battle is in They shall not grow old?
3. How old is Albert in War Horse?
4. What happened to the French girl in War Horse?
5. Is They shall not grow old in color?
6. Who fought in ww1?
7. Which cinema is showing they shall not grow old?
8. Can you buy They shall not grow old on DVD?
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Tags

1. #europe
2. #albert
3. #being
4. #british
5. #despite
6. #france
7. #horse
8. #cavalry
9. #underage
10. #during
11. #enlists
12. #friend
13. #beloved
14. #young
15. #heads