When Miraz has a son of his own, Caspian’s life is in danger. He flees into the woods with a Great Horn (the ancient horn of Queen Susan). When he is cornered by Miraz’s army, he blows the horn, which is what magically summoned the Pevensies back to the land to help him.
Caspian is crowned the rightful King of Narnia. Aslan tells Peter and Susan that they have grown too old and have learned all they can from Narnia, meaning this will be their final trip to that world, while Edmund and Lucy are told they may return one day. Le Monde de Narnia : Chapitre 2 - Le Prince Cas...
While the battle rages, Lucy and Susan find Aslan , who has returned to awaken the very trees and rivers of Narnia. Peter fights Miraz in a one-on-one duel to buy time. Ultimately, the Telmarine army is defeated not just by swords, but by the magic of Narnia itself being restored. When Miraz has a son of his own,
It sounds like you're diving back into the world of C.S. Lewis! Since The Prince Caspian story is a classic, The Plot of Prince Caspian Caspian is crowned the rightful King of Narnia
Narnia has been conquered by a race of humans called Telmarines. They have silenced the "Old Narnians" (the talking beasts, dwarves, and fauns), driving them into hiding. The land is ruled by the cruel King Miraz , who has usurped the throne from the rightful heir: his nephew, Prince Caspian .