Do you know, that the romans were defeated and masacred by the barbarians in the teuteburg forest at 9.A.D? They walked in a trap, where' the terain & weather was not optimal for the romans, to make any suitable formation. Because the path where' they marched, was too tight for them, the mud was due the heavy rain an big obstacle. Their 'shoes' were not maked for terains as that, their armour was due the rain very heavy and was dificult to move around or walk somewhere'. It was the biggest catastrophical defeat in history, with casualities counting more than 30.000 man. And so was the historical most famous 9th legion defeated. Nobody has chance to retreat succesfully, so may they rest in peace.