Why did saddam hussein invade iran in 1980? a. to spread iraqi territory b. to gain control of iranian oil c. bring down ayatollah khomeini's government d. all of the above

I believe that this was actually due to the fact the they wanted some more territory and also the fact that they had lost some of their territory. And based on this, they therefore wanted all of this. Your All of the above.

Both countries had to aprove annexation.