The Gilded Age saw a rise in unhealthy and dangerous working conditions. Most factory owners and bosses were more concerned with profit than worker safety. During industrialization, the work accidents and terrible working conditions were countless To combat this, workers formed unions to fight for higher wages, better hours and safer conditions.
Dude why do you have the same thing on here
Explanation: d The French navy prevented the British ships from entering the harbor.
Primitive family is where it began
Invisible ink: During the Revolutionary War invisible ink usually consisted of a mixture of ferrous sulfate and water.
secret codes: Ciphers and secret codes were used to ensure that the contents of a letter could not be understood if correspondence was captured.
Mask letters: Search Results
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A "Mask Letter" is the name given to a method that the British used during the Revolutionary War to conceal a secret message. This method allowed the secret message to be hidden in plain sight. ... To discover the hidden message, the reader would place a "mask" on top of the letter to reveal the secret message
Not so sure but, I think it was the Mongol Empire.
