 Sinn Féin, the Dáil, the IRB and the army each divided into pro- and anti-Treaty factions.The Supreme Council of the IRB had been informed in detail about every facet of the Treaty negotiations and had approved many of its provisions, and they voted unanimously to accept the Treaty with the single notable exception of Liam Lynch, later COS of the anti-Treaty IRA.The Dáil debated the Treaty bitterly for ten days until it was approved by a vote of 64 to 57.