of trading with the English and the Dutch. La Barre denied these charges. La Barre was determined to remove La Salle, and in the summer of 1683 sent Aubert and Le Ber to seize Fort Frontenac and La Salle's merchandise on the grounds that La Salle had failed to meet the conditions under which he became owner of the fort. There was some validity to this. La Salle's 5-year concession had expired, and the minister had stated that he was far from satisfied with the very limited results delivered by La Salle from his explorations. Later that summer La Barre sent the Chevalier de Baugy to seize Fort Saint-Louis, a trading post built by La Salle's deputy Henri de Tonti. La Barre authorized the Iroquois to seize the goods from any canoe whose owner could not show a passport signed by La Barre. They used this as a license to pillage all the canoes they could find, including ones that carried La Barre's goods. According to Francis Parkman it was these incidents and La Barre's desire to protect his own trading interests that caused him to go to war with the Iroquois. Baron Lahontan also states that the war was intended only to support a trading venture. War against the Iroquois The Iroquois attacked Fort Saint-Louis on 21 March 1684, but Tonti and Baugy drove them off. The Jesuits, who had much experience in dealing with the Indians, advised La Barre to avoid provoking the Iroquois, while the leading men of Quebec wanted to delay war until there was no longer any chance of a negotiated peace, and until fresh troops had arrived from France. The Jesuit missionary Julien Garnier sent a letter to La Barre on 23 April 1684 in which he opposed war against the Iroquois due to the effect it would have on the Jesuit missions. Despite this advice, La Barre launched a war on the Iroquois in the summer of 1684, apparently in order to force them to trade with the French rather than the English. On 30 July 1684 the king wrote to La Barre agreeing with the decision, which had been presented as a response to the attack on Fort Saint-Louis. La Barre left Montreal on 30 July 1684 with 700 militiamen, 400 Indian allies and 150 regular troops, and travelled to Fort Frontenac. He made contact with the Iroquois on 29 August 1684