The strategic value of Chicago as a centre of control for the regions of the Great Lakes and the Mississippi River had long been recognized, but it was not until after the Battle of Fallen Timbers (1794), that the government took active steps to establish a fort here. The treaty made by Gen. Wayne with the Indians after that battle provided for the cession to the American government of a tract of land at the southern end of Lake Michigan including the site of the present city. In 1803 Ft. Dearborn, a block-house and stockade, was constructed by the government on the southern bank of the Chicago River near the present site of the Michigan bridge. In 1812, during the Indian War of Tecumseh, the Ft. Dearborn massacre occurred. The garrison, 93 persons in all, including several women and children, were attempting to escape to Ft. Wayne, when they were set upon by some 500 Indians about a mile and a half south of the fort (southern part of the present Grant Park). The Americans killed included 39 soldiers, 2 women and 12 children. The survivors were captured by the Indians and though some were tortured and put to death, the majority finally escaped to civilization A tablet now marks the site of the old fort and a monument has been erected near Grant Park commemorating the massacre. In 1816 the fort was rebuilt and a settlement rapidly grew up around it. By 1837 the Federal government had begun the improvement of the harbor and had started the Illinois and Michigan Canal. The lake trade grew to enormous proportions, and the building of the railways, especially the New York Central Lines connecting Chicago with the East, as well as other lines connecting it with the Northwest, and the South, gave the city an extraordinary impetus. At the Republican convention held at Chicago in 1860, Abraham Lincoln was nominated for the presidency and during the Civil War, Camp Douglas, a large prison camp for Confederate prisoners, was maintained here.