I'm no expert in the Iran-Iraq conflict, but it does appear the Iranians were invading Iraqi territory and attempting some type of coup.
Well, the Iranians were (vocally) displeased at Saddam's sudden, violent rise to power (as we all might have taken note from Day One, all ye newly-minted, self-proclaimed right-wing "humanists"). However, it was Saddam who invaded Iran on 9.22.80, not vice versa. Initially (ironically), Iran went into battle (to defend itself) with a U.S arsenal (left over from the days of the Shah), and Iraq did their (more aggressive) counterpoint state-sanctioned mass-murder act with mostly Soviet equipment. But that all changed over the next few years, to the point where weapons flooded in from so many corners of America and Europe and the Far East, etc. that it becomes a bit of a depressing jumble to sort through.
But make no mistake about it. The United States sided with Saddam the Murderor and Aggressor in this conflict, whatever the justification at the time. As wiki summarized it:
"The war (Iran-Iraq war) saw the use of chemical weapons, especially mustard gas and sarin, by Iraq. International antipathy toward the Tehran regime meant Iraq suffered few repercussions in spite of those attacks. After the war, the UN eventually condemned Iraq for using chemical weapons against Iran. Chemical weapons had not previously been widely used in any major war since the Second Italo-Abyssinian War"....
Ahh, evolution...
Further, "According to Iraq's report to the U.N., the knowhow and material for developing chemical weapons were obtained from firms in such countries as: the United States, West Germany, the United Kingdom, France, China...."
And, "According to the Washington Post, the CIA began in 1984 to secretly give Iraq military intel that Iraq used to "calibrate" its mustard gas attacks on Iranian troops".... etc. etc. etc. It goes on and on, this war machine, trust me.
Have a nice day.
And yeah like maybe you, Poet, could pen a cool ode to like chemical warfare, or say Mustard Gass......"O faire Gas.................."
Seems a little more suited to your talents, with all due respect, of course.