Military career of Muhammad Quraysh that a Muslim attack was imminent, a Meccan relief force of 1000 men, many of them wearing mail armour, was sent. Abu Jahl, who led the relief army, pressed northwards to where he expected the Muslim army to be: at Badr. While marching, however, around 200–400 warriors left his army and headed back to Mecca. Muhammad was unaware of the Meccan army until one day before contact, when his men captured two Quraysh waterbearers. The Muslims took up a defensive position. The battle started off with a duel between three Muslim and three Meccan champions, which the Muslims decided
Army of the North victory. The battle was favorable to Balcarce even though he again had numerical inferiority (800 royalist against 600 rebels, and in Cotagaita 2,000 royalists against 1,100 rebels). Balcarce earned the rank of brigadier, and the confidence to advance towards the Desaguadero River, border of the viceroyalty in colonial times. Due to internal disagreements Castelli had to dismiss Güemes and his gaucho soldiers. The royalist defenses were left in charge of general José Manuel de Goyeneche, who met with Castelli and signed an armistice to last for forty days from 16 May. The army moved from the encampment at La Laja,