Complex sentence: The need to create a party supporting the Government was not immediate and the second Cumann na nGaedheal did not come into existence until more than a year later, on 27 April 1923 when the pro-Treaty TDs recognised the need for a party organisation to win elections.
Split into simpler sentences: The need to create a party supporting the Government was not immediate. The second "Cumann na nGaedheal" did not come into existence until more than a year later, on 27 April 1923 when the pro-Treaty TDs recognised the need for a party organisation to win elections.