Since the British defeat in the Eurasian War in 1915, Ireland had been independent. Its independence was supported by a clear majority of the populace and by France and Germany, and many believed that the new Irish Republic would now be free forever.
However, one issue had been overlooked – the peace with Britain had left in Ulster a small protestant, pro-British minority, which continued to agitate for a return to the United Kingdom.
In the early years, the Ulster protestants had been willing to participate within the new Irish government, with many believing that religion should not tear apart an island which was clearly a unity in all other aspects. The strong Socialist mood in Britain also favored a focus on internal reform and good relations with the former enemies, which included Ireland. However, that hadn’t lasted long. The initial optimism and tendency to cooperate among Ulstermen faded after a few years, and in 1919 they rose unsuccessfully against Dublin. British (or rather, Labour) passiveness as their countrymen got slaughtered led the Conservative Party back in power, and hostility to Ireland became the norm.
With the British policy of rapprochement with France and trying to woo it against Germany, Irish fortunes fell low in the 1920s, with the Irish Taoiseach’s desperately playing Berlin and Paris out against each other to make sure neither would consider sacrificing Ireland for gaining Britain’s favor. They succeeded, Britain got involved in wars abroad, and a humiliating defeat against Italy, of all countries, over Malta, returned Britain to the initial post-war chaos in 1927.
And here, as Ireland seemed to be able to rest satisfied, her greatest enemy lay, as British politics radicalized. A march on London by fascesti’s (OTL fascists) was narrowly prevented in 1930, and Labour was forced to share power with the Socialists and even some Communards to avoid a right-wing takeover. The king’s position was as far reduced as possible without abolishing the monarchy altogether, and some moves to gain Germany’s friendship against France were made. With those failing, Britain signed an alliance with the Italian Social Republic in 1935. The Rome Pact was born.
As France and Germany continued to waver about patching their differences and restoring their alliance, Italy and Britain stood united and determined against them, prodding together to gain narrow territorial expansion. The Irish question started becoming serious during the winter of 1938/1939, with Germany unwilling to go to war over Ulster – as long as the British territorial gain remained limited to that – and France unwilling to fight alone. The Irish insisted that the problem might solve itself on its own – for years, Irish had been moving to Ulster and Unionists to Britain – only that might take another twenty years unless openly encouraged, and Britain was unwilling to agree to that. A plebiscite became the only option.
In the months up to the plebiscite, chaos reigned in Ulster. The Irish got to determine how the vote was held and they decided to vote by counties, knowing they would keep the most land that way. Dublin was determined to, if possible, keep Britain from gaining any foothold at all on the island, knowing that if they did gain land, it would be an excellent stepping stone for an invasion of the Republic. The British tried to encourage settlement to Ireland, but Dublin and Paris acted together and put a halt on it – no one entering Ireland after March 1st 1939 would be allowed to vote in the plebiscite. In response, Britain encouraged protestants throughout Ireland to move to Ulster (something which was allowed) and actively forged identity cards for new immigrants.
The plebiscite’s outcome would be disputed from the start, that much was clear. While twenty-five years earlier Britain might have been guaranteed to gain some counties, by now, heavily encouraged Catholic migration to Ulster had changed the ethnicity of the area dramatically. What was more, the left-wing British regime was balancing on a thin line between democracy and all-out dictatorship, which led some Conservative party leaders in Britain to encourage their likeminded in Ulster not to vote for Britain. All it got them was arrest and Ulster more confusion. It led to only about 70% of the 850.000 protestants in Ulster being guaranteed to vote for Britain – which, in turn, led London to turn to cheating. The Irish retaliated in turn, and the voting day – April 18th, 1939 – saw innumerable cases of Irish and British bullying alike throughout the counties. The ballot was simple – Britain or Ireland – but the plebiscite was anything but simple.
It took three recounts and haggling over the smallest issues, but on June 2nd a result was finally produced which both sides grudgingly agreed to, even though both in Dublin and London protesters would go to the streets afterwards demonstrating against British or Irish cheating. Calls went up from Germany for a new plebiscite, with international inspectors, but no majority could be gained for that and thus the result stuck.
To some extent, the Irish gerrymandering had succeeded – Irish majorities had been slim in some areas, especially in southern Derry and northern Armagh, and some suspected that without ‘cheating’ it wouldn’t have worked – but also failed. Despite the Irish effort, both Antram and Down voted for Britain, and thus joined the Kingdom of Great Britain on July 1st 1939. This left roughly 400.000 protestants in the Republic of Ireland, and earned Britain roughly 100.000 Catholics. Even after some limited population exchanges (some voluntary, some compulsory) a small Catholic minority continued to reside in British territory (which was promptly oppressed) and a protestant minority in Ireland.
The plebiscite, with all its squabbling and outright fighting, solved little. Both sides broke their promise to keep Ulster demilitarized, and very soon border fortifications rose. Relations between London and Dublin remained frosty, with only very brief reprieves. The longest of them occurred for three weeks in March of 1940, when Britain and Italy were trying to get France to abandon their puppet Italian kingdom in Piedmont and could not use Irish hostility. The Anglo-Italian bid failed, and relations became worse than before, eventually culminating in the second Irish crisis of December 1941. This time, Ireland did not back down, and France supported her. Britain finally had to back down humiliated. They didn’t forget, however. When war did break out between the Continental Entente and the Pact over the Polish and Romanian issues, Britain declared war on Ireland the moment after the peace was shattered, and soon, British tanks rolled into Ireland. Peace had failed. War had prevailed.