Despite successful demonstrations, what was a major psychological barrier preventing the U.S. government from adopting the submarine?

Answer

Military commanders felt sending men and equipment below the waves was inherently risky and unproven.

Established military leadership was accustomed to surface combat and viewed sustained operations beneath the waves as too speculative and inherently dangerous for practical military application.

Despite successful demonstrations, what was a major psychological barrier preventing the U.S. government from adopting the submarine?

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Robert Fulton: Submarines, Mines, and Torpedoes - YouTube

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