An Italian naval officer, Angelo Belloni, seized control of submarine F-43 at the Muggiano shipyards near La Spezia, Italy.
The submarine, originally built for the Russian Navy, was designated to become the Svyatoi Georgjy, but never made it to its intended customer.
Belloni convinced about 15 sailors under his command that they were embarking on a secret mission, but his actual plan was to attack Austro-Hungarian warships in the Adriatic Sea to force Italy into World War I.
Decades before Tom Clancy wrote “The Hunt for Red October,” an Italian naval officer pulled off a stunt that could have come straight from a Cold War spy novel — he stole a submarine to spark a war.
Initially, Italy chose to remain neutral in the early months of the war, citing that they were only allied defensively, and Austria-Hungary had been the aggressor.
Author's summary: The story of Angelo Belloni's submarine heist mirrors "The Hunt for Red October".