How did Mary Ludwig Hays help in the American revolution?

Mary Ludwig Hays helped by giving the American soldier pitcher water while the war was going on. The American soldiers said that she should have not been on the battle field. But Mary Ludwig Hay refuse to stop helping the American soldier. She went on the battle field with her husband. After her husband WA wounded she took is gun and reloded the cannons. they called her "Molly Pitcher."