Final answer:
The battle in Quebec was key to Britain's victory during the Seven Years' War, significantly shifting the balance of power in Europe and marking Britain as the dominant empire.
Step-by-step explanation:
The key location that was crucial to Britain's victory during the Seven Years' War was the battle in Quebec. This was a decisive victory for Britain in the French and Indian War (1754-1763), which is known as the Seven Years' War in Europe. By winning this battle, Britain assumed control over significant French possessions in North America.
Moreover, the Seven Years' War significantly restructured the balance of power in Europe, marking the emergence of Britain as the dominant empire. This victory in Quebec and the subsequent treaty, marked a major shift in colonial power, with a large part of French territories in North America, and even parts of Spanish Florida, coming under British control.
Learn more about Seven Years' War