What were the armed pro-slavery group of Missourians who went to Kansas to vote called?

The armed pro-slavery group of Missourians who went to Kansas to vote were known as "Border Ruffians." They crossed into Kansas to influence the outcome of elections and support the establishment of a pro-slavery government, contributing to the violent conflict known as "Bleeding Kansas." Their actions were part of the broader national tensions over slavery leading up to the Civil War.