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The Stone Age was a broad prehistoric period during which stone was widely used to make tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years,[1] and ended between 4,000 BCE and 2,000 BCE,[citation needed] with the advent of metalworking.
Bragg’s inaction turned a tactical triumph for the South into a strategic defeat, as Union forces were allowed to get safely to Chattanooga. The Confederates subsequently put that city under siege, but in October General Ulysses S. Grant<span> arrived with reinforcements and took over the Union command in the region. </span>