Why are there Canadian teams in the NHL?

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Tags

1. #boston
2. #american
3. #montreal
4. #arenas
5. #canada
6. #senators
7. #maple
8. #nation
9. #toronto
10. #leafs
11. #wanderers
12. #referred
13. #located
14. #teams
15. #later
16. #ottawa
17. #started
18. #became
19. #eastern
20. #canadiens
21. #bruins
22. #which