Answer:
Seven Years War.
Explanation:
Much of the Western Europe was involved in this war, and some historians are even calling it World War because it stretched on the American continent.
On one side main role was in the hand of Great Britain and Prussia, while on the other side France, Habsburg Monarchy, Spain and Russia were the main protagonists. This war additionally showed the division between European forces and it led to establishment of Britain and Prussia as greatest forces in Europe.
