In September, Lee was forced to send his I Corps commanded by general James Longstreet to the Western Theatre around Chattanooga, Tennessee. Meade lost his Union XI and XII Corps who were also sent to Tennessee. Lee was left with about 55,000 men while Meade’s forces now numbered about 80,000. Meade was unhappy about having to give up two Corps and felt he did not have a large enough force to defeat Lee. Lee, however, proceeded with his plan for a turning movement, to get between Meade and Washington DC.