Pizarro did not have a formidable force; with just 170 men, 1 cannon and only 27 horses, he often needed to talk his way out of potential confrontations that could have easily wiped out his party. Their first engagement was the battle of Puná, near present-day Guayaquil, Ecuador; Pizarro then founded the city of Piura in July 1532. Hernando de Soto was sent inland to explore the interior, and returned with an invitation to meet the Inca, Atahualpa, who had defeated his brother in the civil war and was resting at Cajamarca with his army of 80,000 troops.