This historical fact is a well-known aspect of the Second Italian War of Independence, specifically stemming from the Plombières Agreement of 1858 between Napoleon III and Cavour.
The claim is a well-established historical fact about European diplomacy in the 1850s (the Plombières Agreement and subsequent alliance between Napoleon III and Cavour against Austria). The retrieved papers are completely irrelevant, as they discuss modern Italian industrial economics and firm size, making this a classic case where the claim is true and historically documented, but the provided search results offer no pertinent evidence either way.