The definitive history of women in war, revealing how women have always been an essential part of combat. From Boudicca’s rebellion to the war in Ukraine, battlefields have always contained a surprising number of women. Some formed all-female armies, like the Dahomey Mino of West Africa; some fought disguised as men; some mobilized in times of national survival, like the Soviet flying aces known as the Night Witches. International relations expert Sarah Percy unearths the stories of these forgotten warriors. She sets the historical record straight, revealing that women’s exclusion from active combat in the late nineteenth and early twentieth centuries is a blip in a much longer narrative of female inclusion.