Persia and India through the port of Uqair and the port of Qatif. In terms of agricultural importance, Al-Ahsa is of great importance since its area is made up of fertile lands and contains abundant water sources. It is known that the Phoenicians are one of the branches of the Canaanites. The Canaanites moved from the Gulf coast to the Mediterranean coast and settled in Lebanon, Syria and Palestine, carrying with them the names of their cities such as Tyre, Arwad, Byblos and others. Following the migration of the Canaanites from the Al-Ahsa coast, the Jerhaites, a branch of the Chaldeans, settled in their place. Their description of their city came from the Greek traveler Strabo, who said about Al-Ahsa: "It was founded by Chaldean immigrants from Babylon in a swampy land, and it was built of salt stones, eighty thousand cubits away from the sword of the sea."The Greek historian Polybius also described Al-Ahsa as an important commercial center, one of the active markets in the Arab countries, and a crossroads for the caravan routes coming from southern Arabia, the Levant, the Hijaz, Iraq and India. The inhabitants of those countries were among the richest peoples of the island. Their wealth was gold and silver, which stirred greed. At the same time, the Seleucid king Antiochus III led his fleet in 205 BC. He crossed the Tigris, heading to it to seize its treasures, but its people, fearing them for their city and out of their love for peace and in order to preserve their freedom that they cherished, sent a delegation to him carrying a large gift of gold and precious stones. So Antiochus accepted the gift And he closed back to his country, and perhaps the barren desert and the adventure of the trip was the main reason that convinced the Seleucid king to return from his determination. City of Hejir Al-Ahsa was then became a part of a city belonging to the territory of Bahrain at that time, located between Ras Al-Qara mountain, Abu Hasis mountain, and the northern part of Jabal al-Qarah in Al-Ahsa today a place now called the town of Al-Kawarij. The town was of importance to the inhabitants of the Arabian Peninsula, because of the port of Al-Uqair, which served as a link in bringing goods and exporting them to and from Persia, India, China, Africa and Mesopotamia.The port made it the