The resources at his disposal were small, he could not hope to assemble a great expedition; so he determined to make the venture with only a few men and little baggage, relying upon the friendship of the Indians, instead of seeking to conquer them, as the Spaniards had always done. Champlain had from the first treated the Indians well, and it was this necessity of gaining their friendship that determined the policy which France pursued--the policy of making friends of the Indians, entering into an alliance with them, and helping them fight their battles. Champlain opened operations by joining an Algonquin war-party against the Iroquois, and assisting at their defeat--starting, at the same time, a blood feud with that powerful tribe which endured as long as the French held Canada. In the course of this expedition, he discovered the beautiful lake which bears his name. He went back to France for a time, after that, and on his next return to Canada, in 1611, began building a town at the foot of a rock which had been named Mont Royal, since corrupted to Montreal. Succeeding years were spent in further explorations, which carried him across Lake Ontario, and in plans for the conversion of the Indians, to which the aid of the Jesuits was summoned. Missions were established, and the intrepid priests pushed their way farther and farther into the wilderness. To this work, Champlain gave more and more of his thought in the last years of his life, which ended on Christmas day, 1635. Among the young men whom Champlain set to work among the Indians was Jean Nicolet. The year before his death, Champlain sent him on an exploring expedition to the west, in the course of which he visited Lake Michigan and perhaps Lake Superior. Following in his footsteps, the Jesuits gradually established missions as far west as the Wisconsin River, and, finally, in 1670, at Sault Ste. Marie, the French formally took possession of the whole Northwest. It was at about this time there appeared upon the scene another of those picturesque and formidable figures, in which this period of American history so abounds--Robert Cavalier La Salle. La Salle was at that time only twenty years of age. He had reached Canada four years earlier and had devoted himself for three years to the study of the Indian languages, in order to fit himself for the career of western exploration which he contemplated. One day he was visited by a party of Senecas, who told him of a river, which they called the Ohio, so great that many months were required to traverse it. From their description, La Salle concluded that it must fall into the Gulf of California, and so form the long-sought passage to China. He determined to explore it, and after surmounting innumerable obstacles, actually did reach it, and descend it as far as the spot where the city of Louisville now stands, afterwards exploring the Illinois and the country south of the Great lakes, as well as the lakes themselves.