King Hussein of Jordan signed a pact with Egypt on May 30 1967, less than a week before the war, which started on June 5th, 1967, Nasser announced:
The armies of Egypt, Jordan, Syria and Lebanon are poised on the borders of Israel…to face the challenge, while standing behind us are the armies of Iraq, Algeria, Kuwait, Sudan and the whole Arab nation. This act will astound the world. Today they will know that the Arabs are arranged for battle, the critical time is here