Original: This culminated in August 1969 , when Northern Ireland cities like Belfast and Derry erupted in major rioting and British troops were called in at the request of the Government of Northern Ireland ( see 1969 Northern Ireland Riots ) .
Simplified: In August 1969 there was rioting in Northern Ireland 's big cities of Belfast and Derry , and the Government of Northern Ireland asked for the British army to help keep control .