This action helped to spark the Irish Civil War, between pro- and anti-Treaty factions.

The Civil War, between pro- and anti-Treaty factions, broke out in June 1922.

Following the Anglo-Irish Treaty Coyle supported the anti-treaty faction.

The anti-treaty faction, led by Éamon de Valera, rejected partition and wanted a republic immediately.

After this result the anti-treaty faction refused to recognise the new assembly and the Irish Civil War followed shortly afterwards.

In the event the Brigade split into pro- and anti-Treaty factions, the latter led by Forde.

De Valera joined the anti-treaty faction opposing the concessions.

To foster military unity, he established an "army re-unification committee" with delegates from pro- and anti-Treaty factions.

In Limerick, the outbreak of the war saw the city already occupied by both pro and anti-treaty factions.

This attitude eventually led to the outbreak of the Irish Civil War in late June 1922 between pro- and anti-Treaty factions.