Answer
Constance Markievicz was a member of the Sinn Féin political party in 1918. Sinn Féin was a nationalist party that sought to establish an independent Irish republic. Markievicz was a prominent member of the party and was elected to the First Dáil Éireann in 1918. She was also a member of the Irish Citizen Army, a paramilitary group that was closely associated with Sinn Féin.