Julia Parsons, a U.S. Navy code breaker throughout World Struggle II who was among the many final survivors of a top-secret staff of girls that unscrambled messages to and from German U-boats, died on April 18 in Aspinwall, Pa. She was 104.

Her dying, in a Veterans Affairs hospice facility, was confirmed by her daughter Margaret Breines.

A lover of puzzles and crosswords whereas rising up in Pittsburgh throughout the Nice Despair, Mrs. Parsons deciphered German army messages that had been created by an Enigma machine, a typewriter-size system with a keyboard wired to inside rotors, which generated thousands and thousands of codes. Her efforts supplied Allied forces with info essential to evading, attacking and sinking enemy submarines.

The Germans thought their machine was impenetrable. “They simply refused to imagine that anybody may break their codes,” Thomas Perera, a former psychology professor at Montclair State College who collects Enigma machines and has an online museum dedicated to them, mentioned in an interview. “Their submarines have been sending their actual latitude and longitude day-after-day.”

The unraveling of the Enigma puzzle started within the late Thirties, when Polish mathematicians, utilizing intelligence gathered by French authorities, reverse-engineered the system and started growing the Bombe, a computer-like code-breaking machine. The Poles shared the data with British authorities.

In 1941, throughout an operation that was among the many struggle’s most intently held secrets and techniques, the Royal Navy captured a German submarine with an Enigma machine on board. The British mathematician Alan Turing — working secretly with intelligence companies in England — used it to refine the Bombe. British authorities despatched directions for constructing the Bombe to the U.S. Navy.

On the U.S. Naval Communications Annex in Washington, Mrs. Parsons and lots of of different ladies used the Bombe to decipher German army radio transmissions, revealing info that was instrumental in shortening and profitable the struggle, historians have mentioned.

“We tried to determine what the message was saying, then we drew up what we known as a menu exhibiting what we thought the letters have been,” she told The Washington Post in 2022. “That was fed into the pc, which then spat out all attainable wheel orders for the day. These modified day-after-day and the settings modified twice a day, so we have been continually engaged on them.”

She joined the struggle effort in the summertime of 1942, after studying a newspaper article a few new U.S. Navy program known as Girls Accepted for Volunteer Emergency Service, or WAVES. “There was nothing for girls to do however sit at dwelling and wait,” she told The Uproar, the coed newspaper at North Allegheny Senior Excessive Faculty, in 2022. “I knew I wasn’t going to do this.”

Greater than 100,000 ladies joined the WAVES throughout the struggle. In 1943, she left Pittsburgh for officer coaching at Smith Faculty, in Massachusetts, the place she took programs on cryptology, physics and naval historical past. After her coaching, she was despatched to the Naval Communications Annex, in Washington.

Someday, an officer there requested if anybody may communicate German. She had taken two years of the language in highschool, so she raised her hand.

“They shot me off to the Enigma part instantly, and I started studying how you can de­code German U­-boat message site visitors on the job, Day 1,” Mrs. Parsons said in an interview with the Veterans Breakfast Membership, a nonprofit group. “Enemy messages arrived all day from everywhere in the North Atlantic, plus the North Sea and the Bay of Biscay.”

Her cryptological handiwork saved some lives whereas concurrently ending others, presenting her with an ethical quandary as she parsed the day’s messages.

She recalled decoding a congratulatory notice transmitted to a German sailor following the start of his son. His submarine was sunk a number of days later.

“To assume that all of us had a hand in killing any person didn’t sit effectively with me,” Mrs. Parsons advised The Washington Submit. “I felt actually unhealthy. That child would by no means see his father.”

Nonetheless, she was proud to serve.

“This was a really patriotic time within the nation,” she told HistoryNet in 2021. “All people did one thing. All people was patriotic. It was a ravishing time for that form of factor.”

Julia Mary Potter was born on March 2, 1921, in Pittsburgh. Her father, Howard G. Potter, was a professor on the Carnegie Institute of Know-how, now referred to as Carnegie Mellon College. Her mom, Margaret (Filbert) Potter, was a kindergarten instructor.

“Her household was at all times a puzzle household,” Mrs. Parsons’s daughter Barbara Skelton mentioned in a 2013 interview with WESA, a public radio station in Pittsburgh. “It’s at all times crossword puzzles, jigsaw puzzles, so the truth that she was concerned in decoding definitely makes good sense — and he or she’s superb at it.”

After graduating from Carnegie Tech in 1942, Julia labored at an Military ordnance manufacturing unit.

“We have been checking gauges,” she told WESA. “The metal mills have been making shells and all that form of ordnance tools, they usually have been hiring all of the Rosie the Riveters to work there, which was the primary time ladies had been within the metal mills. It was thought of very unhealthy luck to have ladies in, so they didn’t settle for Rosie gracefully.”

The WAVES program supplied an escape — a clandestine one. She advised folks she was doing workplace work for the federal government. She married in 1944, however didn’t spill the key even to her husband, Donald C. Parsons. She didn’t inform their kids, both.

In 1997, Mrs. Parsons visited the Nationwide Cryptologic Museum close to Washington, simply one other vacationer eager about American historical past.

“The displays there astounded me,” she mentioned within the Veterans Breakfast Membership interview. “Right here was each form of Enigma machine — early fashions, late fashions — on show for all to see, with detailed explanations of how they labored.”

She requested a tour information why the machines have been on show. The information replied that the Enigma work had been declassified within the Seventies. Mrs. Parsons hadn’t identified. She spent remainder of her life visiting school rooms and giving interviews, keen to inform her story.

“It’s been good to interrupt the silence,” she mentioned. “Good for me, and for historical past.”

Along with Ms. Breines and Ms. Skelton, Mrs. Parsons is survived by a son, Bruce; eight grandchildren; and 11 great-grandchildren. Her husband died in 2006.

Mrs. Parsons was one of many final surviving code breakers, however she could have had one other distinction — as maybe the oldest Wordle player on the earth. She performed The New York Occasions puzzle each morning on her iPad after which texted the outcome to her kids.

It was a form of code.

“That’s how we knew she was up and about,” Ms. Breines mentioned in an interview. “And if we didn’t hear from her, we’d name and say, ‘The place’s your Wordle?’”