21‭ ‬January 1919: The Declaration of Irish Independence on this day. The first meeting of Dáil Éireann was held in Dublin to bring together all the T.D.s still at liberty to attend. Assembling in the Round Room of the Mansion House, those members elected the previous month in the General Election and not held prisoners by the British or on the run unanimously voted in favour of the Independence of Ireland. Of the 73 Sinn Féin MPs elected only 27 TDs present, 36 were “Fé ghlas an Gallaibh” (prisoner of the Foreigner) including Eamon De Valera and Arthur Griffith.

The Declaration was as follows:
''Whereas the Irish people is by right a free people:‭ And Whereas for seven hundred years the Irish people has never ceased to repudiate and has repeatedly protested in arms against foreign usurpation: And Whereas English rule in this country is, and always has been, based upon force and fraud and maintained by military occupation against the declared will of the people: And Whereas the Irish Republic was proclaimed in Dublin on Easter Monday, 1916, by the Irish Republican Army acting on behalf of the Irish people: And Whereas the Irish people is resolved to secure and maintain its complete independence in order to promote the common weal, to re-establish justice, to provide for future defence, to insure peace at home and goodwill with all nations and to constitute a national polity based upon the people's will with equal right and equal opportunity for every citizen...

We claim for our national independence the recognition and support of every free nation in the world,‭ and we proclaim that independence to be a condition precedent to international peace hereafter: In the name of the Irish people we humbly commit our destiny to Almighty God who gave our fathers the courage and determination to persevere through long centuries of a ruthless tyranny, and strong in the justice of the cause which they have handed down to us, we ask His divine blessing on this the last stage of the struggle we have pledged ourselves to carry through to Freedom.''

A‭ ‬Ministry pro tempore [Temporary Cabinet] was then selected to run the Country for the time being and attempt to bring effect to the Independence of Ireland so proclaimed:

Cathal Brugha was the First President,‭ ‬Professor Eoin MacNeill was Minister of Finance, Michael Collins of Home Affairs, George Noble Count Plunkett of Foreign Affairs and Richard Mulcahy  in charge of National Defence.

21‭ ‬January 1919: Dan Breen and Sean Treacy carried out an ambush on an RIC escort at Soloheadbeag, Co. Tipperary. They were members of the South Tipperary Brigade of the Irish Volunteers (IRA). The cart the RIC were escorting was carrying gelignite for a quarry in the Soloheadbeag area (about four miles from Tipperary Town and about one mile from Limerick Junction).  In the ambush, the two RIC men, guarding the consignment, Constables James McDonnell and Patrick O'Connell, were shot dead. It was the start of the Irish War for Independence.

We expected there would be an escort of about six armed police and vie had the full intention
not alone of taking the gelignite they were escorting but also of shooting down the escort, as an assertion of the national right to deny the free passage of an armed enemy.
The moral aspect of such a decision has been talked about since and we have been branded as murderers, both by the enemy and even by some of our own people, but I want it to be understood that the pros and cons were thoroughly weighed up in discussion between Treacy and myself and, to put it in a nutshell, we felt that we were merely continuing the active war for the establishment of an Irish Republic that had begun on Easter Monday 1916.
DAN BREEN
http://www.bureauofmilitaryhistory.ie/reels/bmh/BMH.WS1739.pdf