A notable event in America was the capture of the fortress of Louisburg, one of the strongest fortifications in the world, mainly by New England troops. It was a grand achievement which thrilled this country and England, and caused consternation in France. A treaty of peace was signed in 1744 at Aix-la-Chapelle, a town in western Germany. New England was enraged to find that by the terms of this treaty Louisburg was given back to France, and all her valor, sacrifice, and suffering went for naught. THE FRENCH AND INDIAN WAR. [Illustration: THE ATTACK ON RIOTERS AT SPRINGFIELD, MASS., IN 1786.] It has already been shown that England and France, who had long been rivals in the Old World, had become equally bitter rivals on this side of the Atlantic. On the west, the thirteen English colonies were walled in by the Allegheny Mountains, beyond which none of the settlers had advanced. All the country lying between these mountains and the Mississippi was claimed by France, who was pushing southward through it, and had given it the name of New France or Louisiana. The first French settlement within the northwestern part of our country was the mission of St. Mary, near Sault Ste. Marie, now in the State of Michigan, it having been established in 1668. Several others of minor importance were planted at different points. England did not oppose the acquirement of Canada by the French early in the seventeenth century, but no serious attempt was made by that people to colonize the territory within the United States until 1699, when D'Iberville crossed the Gulf of Mexico in quest of the mouth of the Mississippi. When he found it, he planted a settlement at Biloxi, now in Mississippi, but removed it in 1702 to Mobile. The Mississippi Company, a French organization, obtained in 1716 a grant of Louisiana, and in 1718 sent out a colony that began the settlement of New Orleans. It will thus be seen that by 1750 the French had acquired large possessions in North America. They were, determined to hold them, and, to do so, established a chain of sixty forts reaching from Montreal to the Gulf of Mexico. These forts were the foundations of many important cities of to-day, such as New Orleans, Natchez, Detroit, Vincennes, Toledo, Fort Wayne, Ogdensburg, and Montreal. To the rear of the main chain of forts were others like Mackinaw, Peoria, and Kaskaskia. Extensive as was the territory thus taken possession of by the French, they were fatally weak because of their scant population, amounting to less than 150,000 souls, while the English colonies had grown to 1,500,000. The French traders were just about strong enough to hold the Indians in check, but no more.