[BroJoeK]

Fiji Hill: "Third Silesian War (I call it that because it lasted not seven, but nine years)."

Of course, this is all so far off topic, it's probably not even funny... However... ;-)

It's called "Seven Years War" only because the name "Nine Years War" (1688–97) was already taken.
And just maybe: a seven years war that took nine years, is about par for government work? ;-)

Anyway, the War of Spanish Succession (1701 - 1714) is listed as taking place in "Europe, North American and West Indies" -- hardly a world-wide war.
No estimates of casualties, but total forces involved were fewer than 500,000.

The War of Austrian Succession (1740 - 1748) is listed as "Europe, North America and India" -- getting closer, but still only three continents.
Total forces involved could approach 1,000,000.

The Seven Years War (1754 - 1763) is listed as "Europe, North America, South America, Africa, India, and the Philippine Islands" -- with total deaths estimated around one million.
I'd say that's approaching the threshold for a true world-wide war.

Napoleonic Wars (1803 - 1815) are listed as " Europe, Atlantic Ocean, Mediterranean Sea, North Sea, Río de la Plata, French Guiana, West Indies, Indian Ocean, North America, South Caucasus " -- with total deaths estimated around five million.

Now check out the three maps:

War of Austrian Succession (1748):

Seven Years War (1763):

Napoleonic Wars (1815):

Interesting to note here the USA is shown as allied with France.
Who knew?

[Fiji Hill]

I think the war in question was called the Seven Years War because in Europe, it wasn't considered to have started in earnest until fighting broke out between Prussia and Saxony in 1756, two years after hostilities started in the backwoods of Pennsylvania.

By the way, we were not allied with France during the Napoleonic Wars. Our 1778 Treaty of Alliance with France ended with the Treaty of Morfontaine in 1800, and the two countries didn't become allies again until they ratified the North Atlantic Treaty in 1949.