I'm referring to our "Global War on Terror", or more specifically, the (civil) war we've got going on in Iraq.
The Saudis have pledged support for the Sunni tribes in Iraq, in the event of an "actual" civil war, if there is no American presence there [source]. This is to counter the threat of an Iranian and Shi'a political/military victory in Iraq.
I remember how before the war, there was a little flash cartoon that purported to show how the war in Iraq would go.. it started with a US invasion, followed by escalations of conflict with Iran and Syria, then the involvement of Saudi Arabia, and on and on.. Its just funny to see it coming closer to being the truth. And by "funny" I mean god damn scary and just fucked up.