Conversation so far:
When did the conquest of Cyprus begin?
1187.
Who was involved?
After Richard became king, he and Philip agreed to go on the Third Crusade, since each feared that during his absence the other might usurp his territories.
Who were the others that he that would usurp his territories?
Philip.
Who was Philip?
Philip II.

Question: Why were they going to Cypress?
Self-contained rewrite: Why were Richard I of England and comrade going to Cypress?