Some of the French grammar is a little strange so a Google image search helped a bit.
1806 was a good clue as that was a signiificant date in Napoleans attempt to gut Austro-Hungary from the bottom up after the A/H defeat at Austerlitz. I forget the name of the particular General he sent to the Balkans but the effort fizzled out.
Likewise the French and British invasion of the areas of Albania, Montenegro and Serbia in 1915 were failures, a diversion from the main attempt at invading the Dardanelles.
You come from a place of fascinating history. Any more definition of exactly where that monument is would be helpful. The background of the youtube takes your breath away.
My wifes grandparents on her mother's side, came from an area on the Adriatic in Italy uphill from Termoli. To this day the elders in the area speak the language they had in the 16th Century; a version on Medieval Croatian.
I'm most interested in that slab on the monument. It's a little hard to see the details, but it looks 12-13th Century to me.
We were in Yugoslavia in Sepytember 1988. Folks knew what was coming and were very afraid. The hotel we stayed in in Dubrovnic was blown up.
Stikpusher served there in the war.
Bill