The Divergent Series: Allegiant (2016) Timeline Explained – Every Event in Order

Tris and Four orchestrate a daring escape from Chicago because they want to discover what lies beyond the city's walls. They've learned that the world outside their faction system exists, and Tris in particular is driven by her desire to find answers about her mother's past and the true nature of their society. The escape also frees their captured friends Caleb, Tori, Christina, and Peter from the city's authorities.

• tris
• four
• escape
• chicago
• factions

The Bureau is a hidden city located beyond Chicago's walls, protected by an impenetrable cloaking shield. It was created by survivors of the catastrophic Purity Wars, which were caused by dangerous genetic experimentation. The Bureau has been secretly controlling Chicago for generations, using it as a genetic purity experiment to develop a naturally pure genome through the faction system.

• bureau
• genetic welfare
• cloaking shield
• purity wars

Tris has accidentally achieved what the Bureau has been trying to create for decades, a genetically pure genome. This happened because her mother was rescued from the wastelands as a child and later volunteered for the Chicago experiment. The Bureau's genetic manipulation through the faction system ultimately produced Tris as the first successful pure genetic specimen.

Foreshadowing: David reveals Tris's mother's involvement in the experiment, explaining why Tris is unique.

• tris
• pure genome
• genetic
• mother
• bureau

David wants Tris because she represents the successful result of decades of genetic experimentation. Her pure genome is invaluable to the Bureau's goal of creating a naturally pure human race. David uses her mother as a bargaining tool and manipulates Tris into working with him by showing her memories of her mother's past.

• david
• tris
• pure genome
• experiment

Four discovers that the Bureau has been abducting children from Chicago and erasing their memories, a practice he finds morally unacceptable. When he tries to warn Tris and convince her to leave with him, David orders Four's execution to prevent him from revealing these secrets. This forces Four to take desperate action against the soldiers sent to kill him.

• four
• bureau
• memory erasure
• children
• execution

Tris chooses to stay with David because she believes she can influence the Bureau to help Chicago. Caleb has informed her about rising tensions between the Allegiants and Factionless in the city, and Tris thinks working with David is the best way to prevent further bloodshed. She also wants to learn more about her mother's connection to the experiment.

• tris
• david
• four
• chicago
• allegiants

The amnesia gas is a secret weapon developed by the Bureau that can erase memories. David makes a deal with Peter to deploy this gas over Chicago, which would effectively create peace by making the population forget their faction allegiances and conflicts. However, it's essentially a tool of mass manipulation that would rob people of their identities and memories.

• amnesia gas
• memory erasure
• bureau
• peace

Evelyn agrees to the amnesia gas deal because she believes it will finally end the faction wars and bring lasting peace to Chicago. As someone who has fought to unite the factions and end bloodshed, she sees the memory erasure as a way to eliminate the divisions that have caused so much conflict, even though it would require erasing her citizens' identities.

• evelyn
• amnesia gas
• peace
• factions
• david

Peter shoots Evelyn in the leg when Tris, Four, and Christina successfully convince her to stop the amnesia gas attack. Furious that his chance at power through the Bureau deal has been thwarted, Peter betrays Evelyn and escapes back to the Bureau. This reflects Peter's consistent self-serving nature throughout the series, he switches sides whenever it benefits him.

Foreshadowing: Peter has always prioritized his own survival and advancement over loyalty to any group.

• peter
• evelyn
• betrayal
• shooting
• leg

Caleb assists Tris in disabling the gas distribution hub and later detonates explosives in the hovercar to destroy the cloaking shield. This represents his redemption arc after initially betraying Tris in the previous film. By helping expose the Bureau to the world, Caleb proves his loyalty to his sister and joins the fight for truth and freedom.

Foreshadowing: Caleb's earlier betrayals make his choice to help Tris at the end more significant.

• caleb
• tris
• gas hub
• hovercar
• redemption

Tris uses the hovercar's communication system to broadcast a message revealing the Bureau's existence and exposing Chicago's role in their genetic purity experiment. Her declaration signals that Chicago will no longer be the Bureau's secret playground, essentially freeing the city from the Bureau's control and manipulation.

• tris
• broadcast
• bureau
• world
• expose

Caleb secretly plants explosives in the hovercar and detonates them as it returns to the Bureau, destroying the cloaking shield that has hidden the city from the world. This act exposes the Bureau's existence to everyone, ending the secret control they held over Chicago and fulfilling Tris's goal of revealing the truth.

• cloaking shield
• bureau
• exposed
• caleb
• hovercar

Four learns from Matthew that David has ordered his execution, so he takes preemptive action during the journey back to Chicago. Realizing the soldiers surrounding him have been tasked with killing him, Four attacks and eliminates them to survive. He then uses a device from Matthew to break through the cloaking shield and return to Chicago.

• four
• soldiers
• execution
• bureau
• escape

Nita, a Bureau officer who trains Christina and Four, provides covert support for Tris's escape because she disagrees with David's authoritarian rule and unethical practices. Her assistance reflects growing dissent within the Bureau against David's leadership and his extreme measures to maintain control.

• nita
• bureau
• dissent
• escape
• david