Butcher was a unit in Shadow Company. It was made up of multiple sub-units. They were tasked with patrolling and guarding Site Hotel Bravo. Many soldiers in Butcher Squad were killed by Captain John Price and Captain John "Soap" MacTavish.
Butcher Seven Edit
Butcher One-Five Edit
Butcher One-Five was assigned to help escort "Gold Eagle" to the LZ. He was most likely were with others of the Shadow Company (if they survived at all) those were the soldiers driving alongside Shepherd in "Endgame".
Butcher Two Edit
Butcher Five Edit
Butcher Five was in charge of setting up explosives in Site Hotel Bravo. They ran into trouble when a detcord was severed and were unable to complete their task as fast as Shepherd wanted them to. They may be the soldiers encountered after breaching the door and entering the room filled with explosives and computer equipment.