Happy birthday :) have a good day
The success of the Roman army was based around the facts that it had excellent organization, great leadership, good training, good equipment, and that is was only consisted of professionals.
The Roman army had only professional soldiers in it. Not everyone was able to become soldiers, as certain physical criteria had to be fulfilled. The ones that became soldiers had training everyday. Tactical training, one to one combat, formation combat etc.
That led to the Roman army to be very successful in its military campaigns, especially because very often it was coming upon poorly organized armies, where most of the soldiers were either part-time soldiers, or just ordinary villagers.
B. In a unitary system there is only one type of government; in a confederal system there are multiple types of governments.
The framers agreed to include the Bill of Rights to satisfy Anti-Federalists. Ant-Federalists believed the Constitution gave the government too much power. The refused to support the Constitution unless it included a Bill of Rights.