Molly Pitcher was a nickname given to a woman said to have fought in the American Revolutionary War

American Revolutionary War

The American Revolutionary War , the American War of Independence, or simply the Revolutionary War, began as a war between the Kingdom of Great Britain and thirteen British colonies in North America, and ended in a global war between several European great powers.The war was the result of the...

, who is generally believed to have been Mary Ludwig Hays. Since various Molly Pitcher tales grew in the telling, many historians regard Molly Pitcher as folklore

Folklore

Folklore consists of legends, music, oral history, proverbs, jokes, popular beliefs, fairy tales and customs that are the traditions of a culture, subculture, or group. It is also the set of practices through which those expressive genres are shared. The study of folklore is sometimes called...

 rather than history, or suggest that Molly Pitcher may be a composite image inspired by the actions of a number of real women. The name itself may have originated as a nickname given to women who carried water to men on the battlefield during the war.
The deeds in the story of Molly Pitcher are generally attributed to Mary Ludwig Hays McCauley.