The battle of Cadore, also known as the battle of Rio Secco or Rusecco, was a battle that took place near Pieve di Cadore during the opening phase of the War of the League of Cambrai, part of the Italian Wars, on 2 March 1508, opposing the Venetian armies commanded by Bartolomeo d'Alviano and those of the Holy Roman Empire under the leadership of Sixt von Trautson. The battle resulted in a decisive Venetian victory, stopping the Habsburg invasion of Cadore and allowing the Venetians to reconquer all their lost strongholds as well as invade Habsburg-ruled lands in Friuli and the Julian March, besieging Trieste and marching on Istria. This would trigger the creation of the League of Cambrai and the beginning of the War of the League of Cambrai.