In the Pacific theater of World War II, the Japanese and the Americans disagreed on the best way to use aces:
Attrition does not just kill men. It destroys skills. Military organizations can regenerate losses in terms of manpower but they have far greater difficulty in regenerating skill.Managing and using skills poses a series of tradeoffs that have long-term effects. In World War II, the Japanese believed the best way to use aces was to kill American pilots. Americans believed the best way to use aces was to train more American pilots. The result was the Great Marianas Turkey Shoot.