https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environment https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environm... Cost billions; more than the Ma

https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environment https://en.wikipedia.org/wiki/Semi-Automatic_Ground_Environm... Cost billions; more than the Manhattan project. Obsolete soon after deployment due to ICBMs. (Taking your "war time" to include cold war time)