Andrew William "Nicky" Barr, was a member of the Australian national rugby union team, who became a fighter ace in the Royal Australian Air Force (RAAF) during World War II. He was credited with 12 aerial victories, all scored flying the Curtiss P-40 fighter. Born in New Zealand, Barr was raised in Victoria and first represented the state in rugby in 1936. Selected to play for Australia in the United Kingdom in 1939, he had just arrived in England when the tour was cancelled following the outbreak of war. He joined the RAAF in 1940 and was posted to North Africa with No. 3 Squadron in September 1941. The squadron's highest-scoring ace, he attained his first three victories in the P-40 Tomahawk and the remainder in the P-40 Kittyhawk.

The Curtiss P-40 Warhawk is an American single-engined, single-seat, all-metal fighter-bomber that first flew in 1938. The P-40 design was a modification of the previous Curtiss P-36 Hawk which reduced development time and enabled a rapid entry into production and operational service. The Warhawk was used by most Allied powers during World War II, and remained in frontline service until the end of the war. It was the third most-produced American fighter of World War II, after the North American P-51 Mustang and Republic P-47 Thunderbolt; by November 1944, when production of the P-40 ceased, 13,738 had been built, all at Curtiss-Wright Corporation's main production facilities in Buffalo, New York.