Appalachian History Series Why East Tennessee mattered in 1863 When Union Maj. Gen. Ambrose Burnside moved into East Tennessee in late summer 1863, his columns relied on thin railroad guards to keep the East Tennessee and Virginia line open. One of those guard posts sat at the Limestone Creek railroad bridge and nearby depot at Telford. A short, sharp fight there on September 8 became one of the most lopsided small actions of the campaign.