The Roman army invented a method of warfare that persisted for 2,000 years. Its troops were rigously trained and exercised and divided into small detachments under the control of officers. Roman soldiers wore effective armour, and developed tactics that allowed them to fight successfully against almost any enemy. They were particularly good at defense. They used to close ranks and protect themselves with large shields, which deflected arrows and spears, until they reached closed quarters and could use their own weapons. The group of soldiers shown above was called the 'tortoise' formation and it proved to be impregnable against their Celtic foes.
Fact file
Emperor Trajan built a monument 30 meters high to the Roman army. This section show Roman legionaires, who were builders as well as fighters, constructing a fort.
resources: Tell me why (Chancellor Press)
image 1: http://1.bp.blogspot.com/-W7QoGph_VnY/UC0_1WRkgqI/AAAAAAAAM30/DJBnYs01RAo/s1600/Trajan-Xanten.jpg
image 2: https://www.hexapolis.com/wp-content/uploads/2015/06/Animated_Visualization_Roman_Army_Organization-770x437.jpg
their costume is awesome.. thank you