First it creates a national government consisting of a legislative, an executive, and a judicial branch, with a system of checks and balances among the three branches. Second, it divides power between the federal government and the states.
This form of democracy is where the power lies within an elected legislature. The legislature and executive branches are together, the elected legislature will choose the prime minister as well.
Answer The Confederate soldiers knew the terrain better than that of their counterparts. A psychological aspect could be that they were fighting for their land, for their families, which could have been the driving force although they were vastly outnumbered.