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
National Democratic Front for the Liberation of Oman and the Arabian Gulf movement. NDFLOAG was supported by urban intellectuals. Ideologically, PFLOAG was Marxist whilst NDFLOAG was Ba'ath-oriented. When it was publicly launched, NDFLOAG had branches in different towns in Oman and in most of the other parts of the Persian Gulf. NDFLOAG began guerrilla operations in northern Oman on June 12, 1970 attacking garrisons at the towns of Izki and Nizwa with mortars. Both attacks failed. The attack on a SAF army post outside Izki was repelled, and the entire unit was either killed or captured. Afterwards several arrests were made, based on testimonies from prisoners from the Izki raid, and three