Imru' al-Qais dreamt of a unified and independent Arab kingdom and, following that dream, he seized many cities in the Arabian Peninsula. He then formed a large army and developed the Kingdom as a naval power, which consisted of a fleet of ships operating along the Bahraini coast. From this position he attacked the coastal cities of Iran - which at that time was in civil war, due to a dispute as to the succession - even raiding the birthplace of the Sasanian kings, Fars Province.