By day they toiled in dirty and dangerous factories, making shells for British forces fighting in World War One.
But after their shifts ended, a group of women from Coalville, in Leicestershire, took to football pitches to make sporting history.
The Coalville Munitions Girls Football Club remains the only women's side to have won the Bass Charity Vase regional competition in its 134-year history.
The little-known story of their unique triumph has now been told in a new BBC podcast - Lost in Time: The Coalville Munitions Girls.
The team lifted the trophy in 1918, when women's sides took part because many men were away serving in the military.