Written By: Eliza Berman

Two events define 1940s fashion more than any others. The first was the beginning of World War II, in 1939. The second was its end, six years and one day later. American trends in the decade can be distinctly divided into those influenced by the changes brought by war in particular the rationing of materials and the increase in women’s participation in the workforce and those inspired by the freedom of post-war peace.

By the end of 1942, materials like wool and nylon had joined sugar and coffee on the growing list of rationed goods. Leather shoes would follow suit the next year, and Americans were strongly urged to donate scrap metal to the war effort. As a result, the silhouettes de rigueur at the beginning of the decade were essentially frozen in time, and fashion entered a no-frills period. (Quite literally ruffles were among a list of details, including extra buttons and pockets, eliminated during times of austerity.)

As a growing number of women entered the workforce to fill posts vacated by men at war, the popularity of pants skyrocketed in part because factory work required the range of motion afforded by trousers, in part because nylon had been diverted from the manufacturing of stockings to the creation of parachutes. Many women sported tailored suits with squared shoulders and narrow waists, sometimes repurposing the suits that languished in their husbands” closets. And simple styles ruled the day as European fashions ceased to be available stateside.

But the tide shifted following the war not all at once, but gradually as Paris resumed its place as the headquarters of couture and Christian Dior’s “New Look” reintroduced more traditionally feminine styles. Utility gave way to softness as square shoulders were rounded and slim skirts became fuller. And the late “40s introduced a newly defined segment of the population, and with it a whole new style icon: the teenager.

Liz Ronk, who edited this gallery, is the Photo Editor for LIFE.com. Follow her on Twitter @lizabethronk.

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

George Karger LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Peter Stackpole LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Alfred Eisenstaedt LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Gjon Mili LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

George Karger LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Herbert Gehr LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Gjon Mili LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Herbert Gehr LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Walter Sanders LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Walter Sanders LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Walter Sanders LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Walter Sanders LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Zoltan S. Farkas LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

George Karger LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Alfred Eisenstaedt LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Ewing Krainin LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Alfred Eisenstaedt LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

11940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Ralph Crane LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Lisa Larsen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Ralph Crane LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Loomis Dean LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Andre De Dienes LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Sharland LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Lisa Larsen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Gordon Parks LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Nina Leen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Leonard McCombe LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Gordon Parks LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Lisa Larsen LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Philippe Halsman LIFE Magazine

1940s LIFE Fashion Cover

1940s LIFE Fashion Cover

Arnold Newman LIFE Magazine

More Like This

lifestyle

Cool Car Shots

Women's Work-Life Dilemma lifestyle

The Women’s Work-Home Dilemma, 1947

lifestyle

Classic Images of College Football

The Youngest Cowgirl in 1955 lifestyle

Give the Gift of Personal Discovery This Holiday Season Thanks to AncestryDNA

Seated close to the evening fire, old man Gray Mountain, 91, tells his small grandchildren legends about the early days of the Navajo people. lifestyle

‘A Country Within a Country’: Inside the Navajo Nation in 1948

Archery providing entertainment for a group of friends at a teenage party, 1956. lifestyle

Celebrate Friendship With LIFE’s Most Memorable Pictures of Pals