Why was the Oregon Trail so dangerous?

Related questions

1. Where did the Oregon Trail start and end?
2. Why is it called the Oregon Trail?
3. Can a horse run itself to death?
4. How many died on the Oregon Trail?
5. Who Mapped the Oregon Trail?
6. Do people still die of dysentery?
7. Who traveled the Oregon Trail?
8. How far did a wagon train go in a day?
9. Can you play Oregon Trail online for free?
10. How did you die on the Oregon Trail?

Tags

1. #probably
2. #swollen
3. #exhaustion
4. #supplies
5. #cause
6. #people
7. #could
8. #threats
9. #pioneer
10. #rivers
11. #crossing
12. #dangerous
13. #accidents
14. #thing
15. #disease
16. #valuable
17. #drown
18. #pioneers
19. #major