Answer:
The Progressive Era was a period of widespread social activism and political reform across the United States that spanned the 1890s to the 1920s. The main objectives of the Progressive movement were addressing problems caused by industrialization, urbanization, immigration, and political corruption
Explanation:
some examples:
May 20, 1862. The Homestead Act of 1862. ...
May 8, 1869. First Transcontinental Railroad. ...
Jan 16, 1883. Pendelton Act. ...
Jan 11, 1901. Socialist Party of America. ...
Jul 10, 1903. The Black Hand-The Mafia. ...
Feb 28, 1904. The Jungle. ...
Jun 30, 1906. Meat Inspection Act of 1906. ...
Mar 4, 1909. Teddy Roosevelt as President.