Question

Of which was the western section of Pennsylvania considered a part?

Answer 1

The answer is "Back country".
The western third of the state of Pennsylvania in the US is referred to as Western Pennsylvania. Pittsburgh is the district's key city, with a metropolitan region populace of around 2.4 million individuals, and fills in as its financial and social focus.
Fun fact: Pennsylvania is also known as the "Bread Basket" of America :)