Chichester-Clark won the leadership election to replace O'Neill and swiftly moved to implement many of O'Neill's reforms. Civil disorder continued to mount, culminating in August 1969 when Catholic Bogside residents clashed with the Royal Ulster Constabulary in Derry because of an Apprentice Boys of Derry march, sparking days of riots. Early in 1971, Chichester-Clark flew to London to request further military aid following the 1971 Scottish soldiers' killings. When this was all but refused, he resigned to be replaced by Brian Faulkner.
