Others arose from the nature of the country itself, and from the manners of its inhabitants.

The country was then extremely woody and full of morasses.
There were originally no roads.

The motion of armies was therefore difficult, and communication in many cases impracticable.

There were no cities, no towns, no places of cantonment for soldiers; so that the Roman forces were obliged to come into the field late and to leave it early in the season.

They had no means to awe the enemy, and to prevent their machinations during the winter.