 Complete the following phrase:  Michael Collins became Commander-in-Chief of the National Army. Shortly afterwards, some dissidents, apparently without the authorisation of the anti-Treaty IRA Army Executive, occupied the Four Courts in Dublin and kidnapped JJ Ginger OConnell, a pro-Treaty general. The new government, responding to this provocation and to intensified British pressure following the assassination by an anti-treaty IRA unit in London of Sir Henry Wilson, ordered the regular army to take the Four Courts, thereby beginning the 