When Hex gets offered the chance to clear his own name by stopping Turnbull from using terror to launch a new civil war, it is an offer the bounty hunter can not turn down.
VOA: standard.2010.06.20
American stature will surely decline further if we launch a war in clear defiance of the United Nations.
You would hope the Americans made it clear in the talks that a launch would be regarded not just as a breach of UNSC resolutions, but of the bilateral deal as well.