Iraq as an independent nation (since 1923) has never successfully taken over Iran. Iraq's incursions into Iranian territory during the first part of the Iran-Iraq War (1980-1982) occupied less than 5% of Iranian territory. However, there have been empires based in Iraq that have conquered Iran such as the Abbassid Caliphate and Ilkhanate in the 800s-1300s.
Petroleum primarily.
Russia sold weapons to Iran and Iraq.
Iran
Saddam Hussein was the President of Iraq who invaded Iran during the Iran-Iraq War.
Iraq was trying to acquire the oil-rich Iranian province of Khuzestan which has an Arab ethnic majority. Iran invaded Iraq in response with no particular piece of land in mind.
Because Iraq wanted to take over Iran's oil. Iran just went through a revolution and the country was not stable. Iraq thought it was their best chance to invade, and it was.
Iraq had the fifth military troops and equipment when the Iran-Iraq war has ended, so a large proportion of the population are armed, and it is has a strategice site in the middle east, many countries in the region have interest in Iraq like Iran.
This was known as the Iran-Iraq War and lasted about 8 years over control of the Persian Gulf, and territorial disputes along the Iran/Iraq border. Prior to Operation Desert Storm in 1991, the Iran-Iraq war (1980-1989) was known as the Gulf War.
Iran > Iraq > Israel.
Iran never looked after Iraq.
Iran.
1980 to 1988
From Eastern Europe to Egypt and Persia (Iraq, Iran, etc.)
Former name of Iran: PersiaFormer name of Iraq: Mesopotamia
Iraq
Iraq and Iran were parts of Persia
Iran is due east of Iraq.