Which act was passed by the united states congress that doubled the size of the army and navy?

Well, based on the question I would say that your answer that you are looking for is going to be the National Defense Act. This is because Congress had passed this act to double the size of the military such as the army to 220,000 soldiers. They also integrated the state National Guards under the federal control.

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Americans agreed to the settlement terms established by the mexican government.