I read somewhere on another forum that the Seven Years War was started by an ambush by George Washington. It got me thinking since I really don't know what started the Seven Years/French and Indian war. What exactly started it? The Prussians or something else?
This is probably oversimplified and Dachs or others will point out how wrong it is but here goes:
The war started in North America. Two years later the French launched the first attack in Europe (resulting in Byng's infamous defeat at the Battle of Minorca) the British then secured an alliance with the Prussians who then launched a preemptive attack on Austria's ally Bavaria and other European powers joined in and it spread to other colonies including the third Carnatic War.
In North America it started as a simple territorial dispute (the most contentious disputes were centred around modern Pittsburg). The British colonies' westward expansion ran into French Louisiana and there were disputes over control of territories. Particularly the French claims were limiting the British fur trade (this same pattern, limited westward expansion would be one of the causes of the revolution as the British limited what French territories acquired in the war could be settled).
Over a number of years the duspute continued, the French attacked attacked a group natives allied and trading with the British and constructed a series of forts in the disputed territories.
In 1854 Virginia sent Washington and a militia force to demand the French to withdraw, but they withdrew when the French refused their demands.
A separate Virginian force was sent to establish a small fort in the diputed territory, but were forced to withdraw by the French. Washington, who had been sent to reinforce this position then ambushed and destroyed a French patrol at the Battle of Jumonvilled Glen.
Following this he established Fort Necessity nearby and was reinforced by additional militia and some British regulars. The fort was besieged by the French and Washington surrendered on condition of being allowed to withdraw with his men.
Upon hearing of this the British decided to send an army to attack the French and the French sent reinforcements to fight the British, resulting in an expansion of the war thoughout the North American colonies in 1855 and leading to war in Europe in 1856.