It would have to be 27 BC when Octavian becomes Emperor.
The Korean War was the first battle of the Cold War, and first major proxy war fought between the United States and a Soviet communist supported enemy. A proxy war occurs when one or more opposing powers instigates a war and then uses third parties to fight on their behalf.
The patriots didn’t have a navy to challenge the Royal Navy.
Then they asked the French King Loui XVI for help and the French navy was able ti challenge the Roayal Navy