Analepsis
Analepsis, from Greek ana- "again" and lepsis "taking," is a narrative technique that interrupts chronological progression to depict events that occurred earlier than the current narrative time. In literary analysis it is often equated with the flashback. By inserting analeptic material, writers can reveal backstory, motives, or hidden information that informs the current situation without waiting for it to unfold linearly.
A distinction is sometimes made between internal analepsis, where a character recalls past events, and external
The use of analepsis requires careful pacing and clear signals to avoid confusing readers about chronology.