The French Air Force aircraft engine series Hispano-Suiza V-12's last two models were used mainly around what war(s)?
Hispano-Suiza 12Y The Hispano-Suiza 12Y was an aircraft engine produced by Hispano-Suiza for the French Air Force in the pre-WWII period. The 12Y became the primary French 1,000 hp (750 kW) class engine and was used in a number of famous aircraft, including the Morane-Saulnier M.S.406 and Dewoitine D.520. Its design was based on the earlier and somewhat smaller, 12X. A further development was under way, the 12Z, but ended due to the German occupation of France.
Fairey Battle The Fairey Battle was a British single-engine light bomber designed and manufactured by the Fairey Aviation Company. It was developed during the mid-1930s for the Royal Air Force (RAF) as a monoplane successor to the earlier Hawker Hart and Hind biplanes. The Battle was powered by the same high-performance Rolls-Royce Merlin piston engine that powered various contemporary British fighters. However the Battle was weighed down with a three-man crew and a bomb load. Despite being a great improvement on the aircraft that preceded it, by the time it saw action the Battle was relatively slow, limited in terms of range and was quickly found to be highly vulnerable to both anti-aircraft fire and hostile fighters, possessing only two defensive .303 in machine guns.