“commanders of raiding bands.” It is possible that these two men got to be leaders because they were from the tribe of Benjamin, the tribe of Saul, and Ish-bosheth. Because they were from Benjamin they should have been expected to have been especially loyal to the house of Saul, but obviously, they were not.
These men were part of the people of Benjamin who moved into Beeroth, which was originally a Gibeonite city (Josh. 9:17), but most of the Gibeonites moved out as 2 Samuel 4:3 says.
“Beeroth.” Originally a Hivite city, it became part of the tribal allotment of Benjamin.