In 1919, the already busy Collins received yet another responsibility when de Valera appointed him to the Áireacht (ministry) as Minister for Finance. Understandably, in the circumstances of a brutal war, in which 'ministers' were liable to be arrested by the Royal Irish Constabulary, the British Army, the Black and Tans or the Auxiliaries at a moment's notice, most of the ministries only existed on paper, or as one or two people working in a room of a private house. Not with Collins, however, who produced a Finance Ministry that was able to organise a large bond issue in the form of a 'national loan' to fund the new Irish Republic. Such was Collins' reputation that even Lenin heard about Collins' spectacular national loan, and sent a representative to Dublin to borrow some money from the Irish "Republic" to help fund the Russian Republic, offering some of the Russian Crown Jewels as collateral. (The jewels remained in a Dublin safe forgotten by all sides until the 1930s, when they were found by chance!)
In retrospect, the sheer scale of Collins' workload, and his achievements, is staggering. From creating a special assassination squad (The Twelve Apostles to kill British agents) to the arrangement of an internationally famous national loan, from running the IRA to effectively running the government (when de Valera travelled for a long period to the United States,) and an arms-smuggling operation, Collins became almost a one-man revolution. By 1920, when he was only thirty years old, Michael Collins was wanted by the British with a price of £10,000 (a vast sum in the 1920s) on his head. And he made enemies among nationalist leaders; two in particular, Cathal Brugha, the earnest but mediocre Minister for Defence, who was completely overshadowed by his cabinet colleague in military matters (even though Collins nominally was only Minister for Finance, with Brugha in Defence supposedly being the big player). Eamon de Valera, the President of Dáil Éireann, also bitterly resented his much younger colleague, all the more so when Collins' reputation reached new heights while de Valera, against Collins' advice, devoted a year to a fruitless search for American recognition for the Irish Republic. Their rivalry was even represented in their nicknames. The extremely tall de Valera earned the nickname the 'Long Fellow' while, to de Valera's fury while he was abroad, Collins won the nickname from his colleagues of the 'Big Fellow'.
For its undoubted tactical cleverness, the IRA, always outgunned and outnumbered and now running out of ammunition faced collapse in mid 1921, which is why a British offer of a Truce so astonished Collins, who questioned whether Britain realised that the IRA was perhaps less than a week away from collapse. Following the Truce, arrangements were made for a conference between leaders of the universally unrecognised Irish Republic (other than Lenin's Russian Republic that needed money and so gave diplomatic recognition to the Irish Republic, not a single other country did so, despite heavy lobbying in Washington by de Valera and at the Versailles Peace Conference by Sean T. O'Kelly) and the British Government. In a move that astonished observers, de Valera (who had in August 1921 the Dáil upgrade his office from prime minister to President of the Republic to make him the equivalent of King George V in the negotiations) then announced that as the King wasn't going, neither should the President of the Republic. Instead, with the reluctant agreement of his cabinet, de Valera nominated a team of 'plenipotentiaries' (ie, delegates with the power to sign a treaty without seeking approval from the government at home) headed by Arthur Griffith and with as his deputy, Michael Collins. With great reluctance (believing de Valera should head the delegation) Collins agreed to go to London.
