On July 4, Ercole d'Este, Duke of Ferrara, Charles' strongest ally in Italy, wrote to him and informed him that the Senate had not yet decided on an action. But Charles was anxious, seeing the enemy numbers growing, while he himself had no hope of reinforcements for the time being. When an effort to sway the undecided forces of Parma was thwarted by the Venetians, Charles instead sent a messenger to request free passage to return to France, but the Venetians replied that he would have to restore all his conquests before such could be considered. The messenger, having scouted the troops, reported back to Charles. The 40 soldiers Charles subsequently sent to reconnoiter were attacked and quickly routed by the Stradioti, mostly Albanian mercenaries from the Balkans.