I'm pretty sure that would be, Frederick Douglass.
There were 2 life stages in the 16th and 17th century (took from google)
There were nine major crusades
The thing which was a major factor that threatened the major unity in the United States in the mid-19th century was:
<h3>The Great Depression</h3>
This refers to the period around 1929 in the United States which has a profound effect on the national economy.
This led to the failure of many banks, increase in unemployment and high deflation rates which all threatened the national unity.
Read more about Great Depression here:
brainly.com/question/441267
Computer or phones or the internet :)
