The treaties also allowed joint navigation on the Uruguay River and its tributaries, and tax exempted cattle and salted meat exports. The treaties also acknowledged Uruguay's debt to Brazil for its aid against the Blancos, and Brazil's commitment for granting an additional loan. In addition, Uruguay renounced its territorial claims north of the Quaraí River, thereby reducing its area to about 176,000 square kilometers, and recognized Brazil's exclusive right of navigation in the Lagoa Mirim and the Jaguarão River, the natural border between the countries.