Who was forced to assume sole responsibility for the war under the treaty of versailles?

freedom of the seas

Explanation:

1. Open diplomacy without secret treaties

2. Economic free trade on the seas during war and peace

3. Equal trade conditions

4. Decrease armaments among all nations

5. Adjust colonial claims

6. Evacuation of all Central Powers from Russia and allow it to define its own independence

7. Belgium to be evacuated and restored

8. Return of Alsace-Lorraine region and all French territories

9. Readjust Italian borders

10. Austria-Hungary to be provided an opportunity for self-determination

11. Redraw the borders of the Balkan region creating Roumania, Serbia and Montenegro

12. Creation of a Turkish state with guaranteed free trade in the Dardanelles

13. Creation of an independent Polish state

14. Creation of the League of Nations