 As a consequence, O'Brien next founded his new political movement, the All-for-Ireland League, which returned eight independent MPs in the December 1910 general elections.The United Irish League remained politically active as Devlin's support organisation for the Parliamentary party, becoming largely infiltrated by members of the Ancient Order of Hibernians, up until the rise of Sinn Féin after the outbreak of World War I in 1914.From 1918, the UIL was restricted to Northern Ireland; it was defunct by the mid-1920s.