Of course for these first three (revolting as they are) you should ad below each "With the US government cheering them on"before "the beginning", we should look back only a few years before:
(1) On September 22, 1980, Iraq invaded Iran, starting an 8 year war in which Iraq employed chemical weapons against Iranian troops and ballistic missiles against Iranian cities.
(2) In February 1988, Iraq forcibly relocated Kurdish civilians from their home villages in the Anfal campaign, killing an estimated 50,000 to 180,000 Kurds.
(3) On March 16, 1988, Iraq used chemical weapons against Iraqi Kurdish civilian opponents in the town of Halabja, killing an estimated 5,000 Kurds and causing numerous birth defects that affect the town today.