Which gulf war? There were 3 of them.
Which Gulf War? There were at least three of them.
Iraq invaded Kuwait. That's why the Gulf War started
Which gulf war? There were three of them in the 20th and 21st centuries.
The US did not start the war in the Persian Gulf; border disputes started the Iran-Iraq War in 1980-1988.
Iraq invaded Kuwait
Which one? There were at least three.
Iran-Iraq War (1980-1988/89).
1990. August 2 to be precise.
August 2, 1990.