Why is it called a military tattoo?

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Tags

1. #drummers
2. #serving
3. #dutch
4. #return
5. #soldiers
6. #early
7. #tattoo
8. #military
9. #century
10. #comes
11. #signal
12. #their
13. #trumpeters
14. #origins
15. #garrisons
16. #instruct
17. #tahitian
18. #phrase
19. #unrelated
20. #barracks
21. #sounded
22. #innkeepers