No, even Ranger Battalion has a ‘pre-ranger’ course for Ranger school. Without it, an even larger majority of Ranger school candidates would fail. It is a good idea to get a handle on Operations Orders, patrol dynamics and other Ranger school tasks that most fail before you go. Most Infantry brigades and battalions run a version or pre Rangr before you even step foot on Benning. What’s the point of sending a soldier to Ranger school (which costs the unit’s money) if a soldier can’t even pass pre Ranger?
At Ft. Bragg they had Recondo School. Kind of similar.