Iran invaded no country in 1990. Iraq invaded Kuwait in this year, but Iran and Iraq are two entirely different countries.
Iraq.
No country invaded Iraq in 1991 for oil resources. The UN Coalition that invaded Iraq in 1991 did so to liberate Kuwait, an Emirate that Iraq had invaded in 1990 for their oil resources.
Kuwait, to Iraq's southwest, was conquered by Iraq in 1990. It was considered the 19th province of Iraq since during the Ottoman Period, Kuwait was part of the Mesopotamian region dominated by Iraq. However, the separation of Kuwait by the British early on made it independent to all but the Iraqis.
Kuwait.
Kuwait.
iraq
Iraq invaded Kuwait and Suadi Arabi
Kuwait
Kuwait
Probably Kuwait...
Iraq