What caused the battle of Passchendaele?

Related questions

1. How many New Zealand soldiers died in Passchendaele?
2. How many soldiers died in Flanders Fields?
3. How did the second battle of Ypres affect Canada?
4. Who won the battle of Somme?
5. What was the reason for the battle of Passchendaele?
6. How many British soldiers died at the Battle of Passchendaele?
7. What was the outcome of the battle of Ypres?
8. How did the second battle of Ypres start?
9. Why was the second battle of Ypres fought?
10. How many battles of Ypres were there?

Tags

1. #through
2. #however
3. #world
4. #launch
5. #attempt
6. #known
7. #later
8. #fought
9. #battle
10. #better
11. #break
12. #douglas
13. #flanders
14. #encapsulate
15. #battles
16. #attack
17. #soldiers
18. #passchendaele