A revolution is known to be a type of activity that people may do when they are trying to protest something. The revolution may be directed towards another person, an organization, or a company. There are also times when people may start a revolution when they want to prove a point to their rulers. A civil war may take place when there are two groups that are against each other in one country.
For example, there are two groups that just cannot see eye to eye; they will start a war against each other so that it can be decided which among the two groups will be followed or which one will be considered to be correct.