Conversation so far:
When was the Paris Peace Conference?
In 1919 Hughes, with former Prime Minister Joseph Cook, travelled to Paris to attend the Versailles Peace Conference.
He remained away for 16 months.
What happened at the conference?
signed the Treaty of Versailles on behalf of Australia - the first time Australia had signed an international treaty.

Question: What did the treaty entail?
Self-contained rewrite: What did the  Treaty of Versailles entail?