Simplify the following text for a Grade 6 native English-speaking person.
Original: SaorstÃ t Ã ireann was adopted as the official Irish title of the Irish Free State when it was established at the end of the Anglo-Irish War ( however this Free State was not a republic but a form of constitutional monarchy within the British Empire ) .
Simplified: SaorstÃ t Ã ireann was also the official Irish title of the Irish Free State .