Operation Pacific (1951) Timeline Explained – Every Event in Order

The submarine's torpedoes repeatedly fail to detonate, either exploding prematurely or not at all. Duke Gifford works with the torpedo specialists at Pearl Harbor to investigate the problem, and they eventually discover the cause. This malfunction nearly costs the crew their lives during multiple engagements, including when they encounter a Japanese aircraft carrier and later a Q-ship.

Foreshadowing: Earlier attacks show the torpedoes failing at different points, building tension toward the eventual discovery.

• torpedo failure
• submarine weapons
• malfunction
• USS Thunderfish

When the Japanese freighter reveals itself as a heavily armed Q-ship and opens fire, Commander Perry is mortally wounded. He orders the boat to crash dive, knowing he cannot get below in time due to his injuries. He stays on deck to ensure the crew can escape, giving Duke effective command to carry out the battle surface and ram the enemy ship.

Foreshadowing: Perry's experience and leadership are shown throughout, setting up his ultimate act of sacrifice.

• Commander Perry
• sacrifice
• Q-ship
• death
• submarine battle

When Duke solves the torpedo malfunction and goes to celebrate with Mary, she rejects him. She explains that since he would not let her into his life when he was at his lowest point, she feels they cannot have a real relationship now. Her priority is her career and the memories of their past, and she believes too much time has passed for them to reconnect.

Foreshadowing: Their earlier reunion shows Duke pulled between duty and love, hinting at the emotional distance that will ultimately divide them.

• Mary Stuart
• rejection
• romance
• Duke Gifford
• relationship

Bob Perry believes that Duke's order to crash dive the submarine is what killed his brother Commander Perry. He refuses to listen to Duke's explanation of events. This creates conflict between the two men, especially as both are competing for Mary's affection.

Foreshadowing: The tension between Duke and Bob is established early when Mary reveals their relationship.

• Bob Perry
• blame
• Commander Perry's death
• conflict

After Commander Perry is mortally wounded and orders a crash dive, Duke takes command and orders a battle surface. He directs the deck guns and anti-aircraft guns to fire at the Japanese ship, disabling its bridge and setting it ablaze. Then he orders flank speed and rams the sub into the Q-ship, holing and sinking it. This bold action destroys the enemy while allowing Thunderfish to escape despite her damaged bow.

Foreshadowing: Duke's leadership and willingness to take decisive action are shown throughout the film.

• ramming
• Q-ship
• battle surface
• submarine attack
• WWII

During the Leyte operation, Thunderfish is part of a scouting line searching for the Japanese fleet heading to attack the American invasion force. Duke broadcasts the fleet's position to Pearl Harbor, knowing it will reveal their presence but understanding the tactical importance of alerting the American forces. Once Pearl Harbor acknowledges, he launches his torpedoes and makes a run for it.

Foreshadowing: The scouting mission establishes the importance of intelligence gathering in the Pacific War.

• Japanese fleet
• Leyte
• broadcast
• scouting
• American invasion

Butch is a newborn infant nicknamed "Butch" who is rescued along with a group of nuns and children during Thunderfish's initial mission to the Philippines. The baby is transported to Pearl Harbor and placed in the base hospital. At the end of the film, Duke and Mary reconcile and head to the hospital together with plans to adopt Butch, signaling their hope for a future together after the war.

Foreshadowing: The rescue mission establishes Butch as a symbol of hope and new life amid war.

• Butch
• baby
• adoption
• nuns
• rescue
• hospital

Despite their torpedoes having failed in previous engagements, Duke and his crew launch a salvo of torpedoes at the Japanese fleet during the Leyte operation. The attack throws the Japanese warships into chaos. Even after enduring a severe battering from depth charges that damage the submarine, Thunderfish manages to sink a Japanese aircraft carrier.

Foreshadowing: The earlier torpedo failures make this success more significant after the problem is solved.

• Japanese carrier
• sinking
• depth charges
• Thunderfish victory

After the Q-ship battle where Commander Perry dies, Mary tries to comfort Duke, but he rejects her attempts. He declares that he only did his duty and feels no regret for his actions. This rejection reflects Duke's emotional distance and his belief that he must remain focused on his responsibilities as a naval officer, not on personal relationships.

Foreshadowing: Duke's sense of duty is established early as his defining character trait.

• Duke
• Mary
• comfort
• duty
• emotional distance

After the Leyte patrol where Duke is wounded and the submarine returns to Pearl Harbor, Mary is waiting for him. The two reconcile, putting aside their earlier conflicts and Mary's rejection. They head to the hospital together to adopt Butch, ending the film on a hopeful note with their relationship restored and plans for a family.

Foreshadowing: The tension between duty and love runs throughout the film, building toward this resolution.

• reconciliation
• Duke
• Mary
• ending
• adoption
• happy ending