Complex sentence: This treaty ended British rule in 26 counties of Ireland and, after a ten-month transitional period overseen by a provisional government, the Irish Free State was created as a self-governing state with Dominion status on 6 December 1922.
Split into simpler sentences: This treaty ended British rule in 26 counties of Ireland and, after a ten-month transitional period overseen by a provisional government. The Irish Free State was created as a self-governing state with Dominion status on 6 December 1922.