Women of All Nations

Flagg discovers that Quirt is running an illegal establishment (a "joint") after being discharged from the Marines. Rather than let Quirt simply face criminal charges, Flagg uses this as leverage, either Quirt re-enlists voluntarily or Flagg will have him arrested. This re-establishes their adversarial dynamic and gives Flagg the upper hand over his rival.

The film establishes their bitter rivalry from the opening trench scenes, showing these two men cannot resist competing.

After the Marines leave Sweden, Elsa travels to Paris where she meets Prince Hassan. She subsequently becomes part of his harem in the Middle East. The film doesn't specify whether she was captive, enticed, or married into the situation, only that she ends up there before the Marines' final rescue mission.

The love triangle in Sweden sets up Elsa as a prize both Flagg and Quirt want, making her later predicament emotionally relevant.

Izzy Kaplan, the only recruit Flagg successfully signs, is killed during the earthquake relief operations in Nicaragua. This marks a brief moment of tragedy in the film, though it receives limited narrative weight before the story moves forward.

Flagg's promise to look after Izzy's father establishes emotional stakes that are cut short by Izzy's death.

The love triangle in Sweden becomes untenable when Olaf (Elsa's boyfriend) intervenes on her behalf. Rather than continue their rivalry over Elsa in Sweden, the three Marines are reassigned to Nicaragua for humanitarian mission, earthquake rescue and relief work.

The tension in the Swedish café scene directly leads to their departure.

During the rescue from the harem, Elsa is smuggled out in an enclosed carriage chair. As Flagg and Quirt argue over who will win her affection, Olsen's signature sneeze is heard from inside the chair, revealing he is the one hiding with Elsa. This comic twist decides the love triangle in Olsen's favor.

Olsen's chronic sneezing problem has been a recurring source of frustration for Flagg throughout the film, making his sneeze the perfect comedic payoff.

The film creates confusion here, Flagg digs up a buried Marine during the Nicaragua earthquake relief and believes the body is Quirt. However, Quirt later appears alive, suggesting either the identification was wrong or this was simply a narrative error. The film doesn't explicitly explain this discrepancy.

Flagg and Quirt are established as lifelong rivals who first clashed in World War I trenches and later served together through the Panama campaign. Their animosity is immediate and enduring, driving much of the film's comedy as they compete for promotions, women, and bragging rights across every assignment.

The film opens with them in the trenches already feuding, setting up their adversarial dynamic for the entire narrative.

Flagg recruits Izzy Kaplan as his only successful recruit in Brooklyn. He promises Izzy's father that he will look after the young man, giving Flagg personal responsibility for Izzy's wellbeing, a promise that becomes tragic when Izzy dies in Nicaragua.

Flagg's unsuccessful recruiting record contrasts sharply with his one success, making Izzy's death more impactful.