In December 1920, Quốc (Ho) became a representative to the Congress of Tours of the Socialist Party of France, voted for the Third International and was a founding member of the French Communist Party. Taking a position in the Colonial Committee of the party, he tried to draw his comrades' attention towards people in French colonies including Indochina, but his efforts were often unsuccessful.
In the Government of Ireland Act 1920 (enacted in December 1920), the British government attempted to solve the conflict by creating two Home Rule parliaments in Ireland: Northern Ireland and Southern Ireland. While Dáil Éireann ignored this, deeming the Irish Republic to be already in existence, Unionists in the north-east accepted it and prepared to form their own government.
On 10 December 1920, martial law was proclaimed in Counties Cork, Kerry, Limerick and Tipperary in Munster; in January 1921 martial law was extended to the rest of Munster in Counties Clare and Waterford, as well as Counties Kilkenny and Wexford in Leinster.
On 11 December, the centre of Cork City was burnt out by the Black and Tans, who then shot at firefighters trying to tackle the blaze, in reprisal for an IRA ambush in the city on 11 December 1920 which killed one Auxiliary and wounded eleven.