It represents the Oregon Territory and a settlement between the United States and Britain.
Explanation:
The area that is shaded in this map corresponds to the Oregon Territory. The Oregon Territory was an area that existed between 1848 and 1859 in the United States. From 1846, the Oregon Territory was divided between the United States and Britain. This territory included areas of what is now Oregon, Washington, Idaho, Wyoming and Montana.
It occurred because it was cheaper and businesses could retain more money and underpay their workers. The practical reasons are that children are faster, they can fit into smaller spaces and are more controlled.
