Complex sentence: Arthur Griffith, the Free State president had also died of a brain haemorrhage ten days before, leaving the Free State government in the hands of William Cosgrave and the Free State Army under the command of General Richard Mulcahy.
Split into simpler sentences: Arthur Griffith, the Free State president died of a brain haemorrhage ten days before. The Free State government was subsequentle led by William Cosgrave and the Free State Army by General Richard Mulcahy.