What was the last country to enter ww1?

Related questions

1. Why did Gavrilo Princip kill Ferdinand?
2. WHO declared World War 1?
3. How much did Germany pay after ww1?
4. Do you wear military medals to a funeral?
5. Who decided ww1 end?
6. Why was Archduke Ferdinand assassinated?
7. What side do I wear my father's medals?
8. Why did Serbia kill the Archduke?
9. What started WW 1?
10. Why did the Central Powers lose the first World War?

Tags

1. #october
2. #ottoman
3. #defensive
4. #still
5. #romania
6. #empire
7. #after
8. #country
9. #serbia
10. #hands
11. #which
12. #resentful
13. #bulgaria
14. #treaty
15. #greece
16. #signed
17. #powers
18. #alliance
19. #central
20. #declaring
21. #august
22. #defeat