Jane Russell in “The Outlaw” (1943).

Jane Russell in “The Outlaw” (1943).

Four female Loyalists patrol the street with rifles over their shoulders, watching out for the rebel forces of Gen. Francisco Franco. Spain, 1937.

Four female Loyalists patrol the street with rifles over their shoulders, watching out for the rebel forces of Gen. Francisco Franco. Spain, 1937.

Alfred Eisenstaedt, Provincetown, Massachusetts, USA, 1940.

Alfred Eisenstaedt, Provincetown, Massachusetts, USA, 1940.

Women training to become soldiers during the India-China border war. Photograph by Larry Burrows. India, 1962.

Women training to become soldiers during the India-China border war. Photograph by Larry Burrows. India, 1962.

First Lady of Vietnam Madame Dinh Nhu Ngo firing a .38 pistol. Photograph by Larry Burrows. Vietnam, June 1962.

First Lady of Vietnam Madame Dinh Nhu Ngo firing a .38 pistol. Photograph by Larry Burrows. Vietnam, June 1962.