August 2, 1776 is the answer
Answer: ok ok ok ok ok ok ok
Explanation:
Ok?
The Ohio River Valley was fought over for resources that were good for trade such as fur. The French and British were fighting over power and resources during this time. French had colonized lands to the West while the British colonized lands on the East Coast of North America. They had a border dispute as to who owned the land in the Ohio River Valley, and the French and Indian War break out.
The name for this idea is "Domino Effect" - this is a theory that says that if one country falls to Communism the neighboring countries would also fall to Communism, much like pieces of Dominos fall when a neighboring piece fell.
This theory was important in the Foreign politics of the US during the cold war.