Background
He was born in Sydney to doctor George Armstrong and Florence Edith Ewan.
He was born in Sydney to doctor George Armstrong and Florence Edith Ewan.
He attended Scots College and became a grazier, working first on the family"s Albury property and then at Winderadeen and Collector.
In 1956 he defected to the Country Party. In 1969, following the finding of the Court of Appeal in Barton v Armstrong that Armstrong had threatened to have a business associate killed, he was expelled from Parliament. He died at Alice Springs in 1985.
A member of the Liberal Party, he was elected to the New South Wales Legislative Council in 1952.