In Prince Caspian, the movie version at least, at the end after the great battle we get a city scene showing Caspian, 4 kings, Aslan and various Narnia creatures riding into the city, being cheered by what I think is an exclusively human crowd. But why are they cheering?
The way I understood the plot, those humans must be Telmars, in their minds sole rightful inhabitants of the land for many years now. The Narnian creatures started a rebellion against them – and their rightful crowned king gathered an army to fight them.
The way the beginning of the battle went, the average soldier must think that their king was betrayed and assassinated by Narnians, a despicable act.
During the battle various magical stuff happened and the lion-god of the enemy made sure the Telmar armies were defeated. Returning soldiers, those who survived at least, would have a terrible tale, surely not warming Caspian's image - if they were allowed to go home, that is, and if they were not the situation would be even worse.