What would happen if Iraq descends into chaos. How would the current players respond?
The US would likely retreat into Kurdistan and back into Kuwait.
The Shia and the Sunni will continue to duke it out in the remaining Iraq.
What would Iran do? Would Iran be drawn into Iraq? And could this then either ignite a regional war? If a regional war does not develop could Iran be drawn into an Iraq turmoil, now perpetuated by US and allies, and subsequently destabilize Iran itself?