evidence: Three Disputed Islands: Abu Musa, Greater Tunb & Lesser Tunb - Abu Musa, Greater Tunb and Lesser Tunb are three small islands located near the entrance of Strait of Hormuz in Persian Gulf. [...] - Though the size of these islands is very small, the strategic importance of these islands is that due to the greater depth of sea large oil tankers and ships pass between Abu Musa and Greater and Lesser Tunb islands. [...] Iran-UAE dispute over the islands - Iran's claim: According to Iran, these islands have historically under its control. In 1971, the then Shah of Iran dispatched Royal Navy to these three islands after the British withdrew its forces from UAE. These three islands fell into British hands in 1921, prior to which they were under Persian control.