Shortly after assuming power, Khomeini began calling for Islamic revolutions across the Muslim world, including Iran's Arab neighbor Iraq, the one large state besides Iran with a Shia majority population. At the same time Saddam Hussein, Iraq's secular Arab nationalist Ba'athist leader, was eager to take advantage of Iran's weakened military and (what he assumed was) revolutionary chaos, and in particular to occupy Iran's adjacent oil-rich province of Khuzestan, and to undermine Iranian Islamic revolutionary attempts to incite the Shi'a majority of his country.