The requirement of colonists to pay for the upkeep of British soldiers is known as Quartering. This requirement was part of the Quartering Act and was an amendment to the Mutiny Act.
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
Technically, continuous improvement is an operations concept developed in Japan, although of course it quickly spread to other countries and economies since it provides for more efficiency.
