|Strait of Hormuz traffic scheme.|
- Iran first threatened to close the Strait in 1984 after Iraq attacked several Iranian ships in the area.
- The US and Iran came to blows there in April 1988 after an Iranian mine damaged an American frigate. Several Iranian ships were sunk and damaged in retaliation. In July that year, an American ship shot down an Iranian airliner, killing 290 people.
- Iran and UAE have both claimed possession of the islands of Abu Musa – said to contain large deposits of oil – Greater Tunb, and Lesser Tunb. Iran occupies the islands militarily at the moment.
- The US and Iran again ratcheted up tension in 2007-2008, when several armed Iranian speedboats had close encounters with ships from the American Fifth Fleet.