Complex sentence: The Brigade Patrol Troop is seen as a stepping stone between the Royal Marines Commandos and the SBS, similar to how the Parachute Regiment's reconnaissance unit the Pathfinder Platoon is seen as a stepping stone between the regular army and Special Forces the SAS.
Split into simpler sentences: The Brigade Patrol Troop is seen as a stepping stone between the Royal Marines Commandos and their Special Forces the SBS. Similar to how the Parachute Regiment's reconnaissance unit the Pathfinder Platoon is seen as a stepping stone between the regular army and Special Forces the SAS.