By 1918 David Lloyd George was Prime Minister, leading a coalition government, and in addressing a very grave military situation it was decided to use a new 'Military Service Bill' to extend conscription to Ireland and also to older men and further groups of workers in Britain, thus reaching untapped reserves of manpower.
[6][3][7] The linking of conscription and Home Rule outraged the Irish nationalist parties at Westminster, including the IPP, All-for-Ireland League and others, who walked out in protest and returned to Ireland to organise opposition.
The Irish Anti-Conscription Committee was convened to devise plans to resist conscription, and represented different sections of nationalist opinion: John Dillon and Joseph Devlin for the Irish Parliamentary Party, Éamon de Valera and Arthur Griffith for Sinn Féin, William O'Brien and Timothy Michael Healy for the All-for-Ireland Party and Michael Egan, Thomas Johnson and William O'Brien representing Labour and the trade unions.
[17] In the following weeks, anti-conscription rallies were held nationwide, with 15,000 people attending a meeting in County Roscommon at the start of May, where John Dillon, leader of the Irish Parliamentary Party and Éamon de Valera of Sinn Féin shared the platform.
This in itself is notable as, while sharing nationalist views, Dillon and de Valera's parties had previously been divided in opinion as to the means of gaining legislative or complete independence from the United Kingdom.
In fact, because of the lack of evidence, the German Plot was little believed in Great Britain, Ireland or the United States, but aggravated opinion and increased support for Sinn Féin.
The plan simply called for a letter (drafted by Hay and approved by Edward Shortt and then Chief Secretary for Ireland) to be sent by the French Primate to the Irish bishops, requesting that they soften their opposition to conscription to aid the war effort in France.
Despite some progress in August in persuading Primate of All Ireland Cardinal Logue, the "Hay Plan" was delayed and ultimately stymied by complications in diplomatic channels and by political rivalries.
Recruitment efforts through September and October continued to have very limited success, and by the time of the November Armistice, marking the end of World War I, conscription had still not been implemented in Ireland.
[2] Completely ineffectual as a means to bolster battalions in France, the events surrounding the Conscription Crisis were disastrous for the Dublin Castle authorities, and for the more moderate nationalist parties in Ireland.
Sinn Féin's association (in the public perception at least) with the 1916 Easter Rising and the anti-conscription movement, directly and indirectly led on to their landslide victory over (and effective elimination of) the Irish Parliamentary Party, the formation of the first Dáil Éireann and in turn to the outbreak of the Anglo-Irish War in 1919.