Tombstone

In 1879, members of an outlaw gang known to wear red sashes called the Cowboys, led by "Curly Bill" Brocius, ride into a Mexican town and interrupt a local police officer's wedding. They then proceed to massacre the assembled policemen in retribution for killing two of their fellow gang members. Shortly before being shot, a local priest warns them that their acts of murder and savagery will be avenged, referencing the biblical fourth horseman.