1. The main argument in support of the decision to use the atomic bomb is that it saved American lives which would otherwise have been lost in two D-Day-style land invasions of the main islands of the Japanese.
2.For American military commanders, determining the strength of Japanese forces and anticipating the level of civilian resistance were the keys to preparing casualty projections
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Answer:
1939
Explanation: it started in october 29,1929 but it ended in 1939
