Persian Gulf flooding of the basin started 15,000 years ago due to rising sea levels of the Holocene glacial retreat. This inland sea of some is connected to the Gulf of Oman in the east by the Strait of Hormuz; and its western end is marked by the major river delta of the Shatt al-Arab, which carries the waters of the Euphrates and the Tigris. In Iran this is called "Arvand Rood", where "Rood" means "river". Its length is , with Iran covering most of the northern coast and Saudi Arabia most of the southern coast. The Persian Gulf is about wide
Battle of the Gulf of Oman Battle of the Gulf of Oman The Battle of the Gulf of Oman was a naval battle between a large Portuguese armada under Dom Fernando de Meneses and the Ottoman Indian fleet under Seydi Ali Reis. The campaign was a catastrophical failure for the Ottomans who lost all of their ships. Since the Siege of Diu in 1538, the Ottoman Empire was attempting to counter Portuguese influence in the Indian Ocean. In 1552, Ottoman admiral Piri Reis led a number of expeditions around the Arabian peninsula against the Portuguese with limited success. He was replaced with Murat Reis, who also