Fort Benning is a U.S. Army base 125 miles away from the city of Atlanta, Georgia. It is first mentioned by Shane to Rick (and the other survivors) that the base is a better choice over the CDC for shelter in the episode, "Wildfire". However, the survivors chose to first travel to the CDC, but after finding a "dead end" there; the survivors decided to head towards the Fort Benning Military Base. However they later learned from Dave and Tony that Fort Benning was overrun but due to their un-trustworthiness it's unknown if they were telling the truth. However Mitch Dolgen states that he was stationed there when it was overrun and stole a tank, revealing Dave and Tony were telling the truth.
Fort Benning, prior to the outbreak, supports more than 120,000 active-duty military, family members, reserve component soldiers, retirees, and civilian employees on a daily basis.
According to Tony, Fort Benning is overrun by "Lame-Brains". This may or may not be true, for it is assumed that Dave and Tony were untrustworthy, yet at the time they had no reason to lie because Glenn had not brought up the farm yet.
Fort Benning is mentioned by Mitch Dolgen as having been a refugee camp after the outbreak, but had been overrun sometime in the beginning of the outbreak and by the time Tony, Dave and his group drove past, it was overrun. This could possibly mean that Dave and Tony were indeed telling the truth.