The Marauders' Friendship and Betrayal
Harry Potter and the Prisoner of AzkabanThe story of the four friends at Hogwarts, their transformations, and the ultimate betrayal by Pettigrew.
increasing
Bearing strength in each event
decreasing
The Marauders' formation

The Four Friends
The Beginning
James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew became friends at Hogwarts. They discovered Lupin was a werewolf and decided to become Animagi to keep him company during full moons.
The Transformations
After three years, they succeeded. James became a stag (Prongs), Sirius a dog (Padfoot), and Peter a rat (Wormtail). They spent nights roaming the castle and grounds, creating the Marauder's Map.
The Bond
Their friendship was strong. They were known as troublemakers but were loyal to each other. The map and their nicknames were symbols of their bond.
Pettigrew's betrayal

The Break
The Switch
Sirius convinced James to make Pettigrew the Secret-Keeper instead of himself, thinking it would be a safe bluff. But Pettigrew had already been recruited by Voldemort.
The Betrayal
Pettigrew revealed the Potters' location to Voldemort, leading to their deaths. He then faked his own death, framing Sirius. The Marauders' friendship was shattered by betrayal.
The Aftermath
Lupin believed Sirius was the traitor. Sirius was imprisoned. Pettigrew lived as a rat. The friendship that had been so strong was destroyed by one cowardly act.
Lupin and Sirius reunited

The Reconciliation
The Embrace
Lupin arrives at the Shrieking Shack and, after a moment of shock, embraces Sirius. They are both relieved to know the truth. Their friendship is renewed.
The Shared Purpose
They stand together against Pettigrew. They are ready to kill him, but Harry stops them. They respect Harry's decision. The bond between Padfoot and Moony is restored.
The Legacy
Though the Marauders are reduced to two, the friendship endures. They part ways, but they are connected by their shared history. The map remains a symbol of their bond.
Their years at Hogwarts
The night the Potters died
Shrieking Shack