Va Irree Magh anraahoil y Chaisht 'sy vlein 1916 stiurit liorish y possan shen jerrinagh, as ren y freggyrt Goaldagh, cur gys baase jeh ny fir hoshee, caghlaa yn teaym ashoonagh gys Reill Thie. Hooar y partee currit rish seyrsnys, Sinn Féin, screeuyn-drommey mooarey ayns Ard-Reihys ny bleeaney 1918 as 'sy vlein 1919 va parlamaid as reiltys lhieu hene fogrit magh - Pobblaght Nerin. Ren ny h-eaghtyryssyn Goaldagh eab y doolane shen dy chur fo chosh, agh haghyr caggey keylley myr eiyrtys veih'n vlein 1919 derrey Jerrey Souree ny bleeaney 1921, as y caggey shen creaghney ayns scuirr caggee. Va'n Conaant Anglo-Yernagh creaghnit eddyr y Reiltys Goaldagh as çhaghteryn jeh'n Chied Dáil (Çhionnal Nerin) 'sy vlein 1921. Hug y conaant slane seyrsnys da Nerin ayns cooishyn thie as begnagh slane seyrsnys ayns polasee joarree. Ansherbee, lhisagh da dagh çhaghter Yernagh jean loo ammys da'n Chrooin Ghoaldagh. As va steat reill thie jeant jeh Nerin Hwoaie çheu sthie jeh Steat Seyr Nerin noa, agh va olt reih magh eck, olt va jeant jeeragh ny lurg. Ren arganeyssyn mychione ny kiarailyn rheynn 'sy ghleashaght ashoonagh as haghyr caggey theayagh eddyr y reiltys noa 'sy Steat Seyr as adsyn va goll noi'n chonaant, as ad stiurit liorish Éamon de Valera. Haink jerrey oikoil lesh y chaggey theayagh ayns Mee Voaldyn 1923 tra ren de Valera fogrey magh oardagh er scuirr-chaggee.