The US picks some hopped-up petty dictator in a no-where state.
The US then provides said dictator with funds.
For a chemical weapons program.
To be used against an enemy of the USofA.

Then, the hopped-up petty dictator uses the chemical weapons.
Against a non-enemy of the US.

Does the US immediately take any action against said hopped-up petty dictator?

No.

His killing these people ONLY becomes an issue in later years.


...this reminds me of Microsoft and any company that they work in a "partnership" with.