Complex sentence: However, Jordan's King Hussein got caught up in the wave of pan-Arab nationalism preceding the war; and so, on May 30, Jordan signed a mutual defense treaty with Egypt, thereby joining the military alliance already in place between Egypt and Syria.
Split into simpler sentences: However, Jordan's King Hussein got caught up in the wave of pan-Arab nationalism preceding the war;. On May 30, Jordan signed a mutual defense treaty with Egypt, thereby joining the military alliance already in place between Egypt and Syria.