Here is a great explanation of just how big a Roman army legion was. When Pompey the Great annexed Syria and Palaestine and created the Decapolis (inc. Gadara / Umm Qais) in 64BCE he likely brought 5 legions with him.
Prince Charles, the Prince of Wales and Camilla, the Duchess of Cornwall, on their second day of the official visit to the Kingdom visited Umm Qais. Prince Charles and the Duchess of Cornwall, accompa