What new weapon made allied leaders worry about the cost of invading the japanese mainland? kamikaze fighters machine guns atomic bombs warplanes

atomic bombs is your best answer

The atomic bomb didn't make the Ally leaders worry at all, but they were looking for an alternative from invading Japan, which would have costed thousands of lives, and trillions of dollars. Instead, the atomic bomb was the best solution, even with radiation fallout.

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answer: a video that encourages an armed attack on the government.

explanation: it is a violent overthrow to the government.

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