The French were naturally overjoyed at the South Slavic Kingdom's initiative to side with them.
Overall, not only could South Slavia allow the French to have another ally to contain Italy, but it could also help the French gain an advantage in the Mediterranean Sea.
After all, South Slavia is also a Mediterranean coastal country and just happens to be in a position to encircle Italy from both the east and the west along with the French.
If the South Slavic Kingdom could join the Franco-Austrian alliance, then the Austrian Empire would be able to withdraw part of its army to defend against Germany, and the pressure of the German army facing France would not be so great.
The ecstatic French immediately signed a Mediterranean defense agreement with South Slavia, tying South Slavia to their own chariot of war.