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The name of the device is the <span>Fessenden oscillator. It was made to allow submarines to communicate through Morse code. This way they could avoid communication being intercepted.</span>
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I think it's C. Texas recovered more quickly than the rest of the South after the Civil War.
(I'm so sorry if it's wrong)
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The American Revolution was a war for independence from Britain with many battles and diplomatic meetings such as the Continental Congresses. it was caused by the relentless taxation of the British government and other disputes such as the Boston Massacre.