What year is Attack on Titan set in?

Related questions

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2. Is Attack on Titan coming to an end?
3. Who is the titan that killed erens mother?
4. Will There Be Attack on Titan Season 4?
5. What Titan is Armin?
6. How old is Levi Ackerman now?
7. Is Levi Ackerman short?
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Tags

1. #calendar
2. #between
3. #industrial
4. #later
5. #story
6. #because
7. #never
8. #place
9. #enemy
10. #appeared
11. #means
12. #years
13. #starts
14. #theory
15. #found
16. #revolution
17. #titan
18. #which
19. #colossal