The most important centripetal force in yugoslavia before its breakup was the

unit of currency
   Compliant with the 1920 Law on the National Bank, the NBY was given the benefit of note issue, which secured the Kingdom's whole domain. The relations of the NBY with the administration had been for the most part along guaranteeing trade approach steadiness and going about as the administration's treasurer.
    Upon the forming Yugoslavia, it was important to safeguard financial soundness, bind together the fiscal framework and broadcast a solitary cash. The cash issue was settled by assention that the dinar ought to be the money related unit and every other money ought to be pulled back from dissemination.