The Dalton Girls (1957)

After the Dalton brothers are killed off by lawmen, their female relatives take up where they left off, but armed with more dangerous weapons. The embark on a series of stagecoach robberies, bank hold-ups and picking up loose change here and there. The girls are Holly (Merry Anders,, the oldest and gang-leader; Rose Lisa Davis),, a cold-blooded killer; Columbine (Penny Edwards), who mostly wants out; and Marigold ('Sue George'), who mostly holds the horses. A gambler, W. T. "Illinois" Grey (John Russell), is on hand to bind Columbine's wounds.