On 21 September 2014, an agreement was signed in Sana'a under UN patronage essentially giving the Houthis control of the government after a decade of conflict. Tribal militias then moved swiftly to consolidate their position in the capital, with the group officially declaring direct control over the state on 6 February 2015. This outcome followed the removal of Yemen's President Ali Abdullah Saleh in 2012 in the wake of protracted Arab Spring protests. Saudi Arabia has exercised the predominant external influence in Yemen since the withdrawal of Nasser's Egyptian expeditionary force marking the end of the bitter North Yemen Civil War.