- Period:
- Second World War (1939-1945)
- Rank:
- Commodore (Second Class)
- Unit:
- HMAS Australia (II), Royal Australian Navy
- Awarded on:
- May 15th, 1947
"For extraordinary heroism and distinguished service in action as Commanding Officer of HMAS AUSTRALIA during the capture of Lingayen Gulf and the landing on Luzon, Philippine Islands from 6 January to 9 January 1945. Although Australia was heavily hit, suffering heavy casualties and the disablement of a large portion of her anti-aircraft guns and radar system, Captain Armstrong maintained her assigned station and carried out her bombardment missions."