Once a boy reached 11 he was done with Cub Scouts. But Boy Scouts officially starts at age 12. So there is this transition year when the boy is no longer a Cub but not quite a Scout. When I was growing up, that transitional state was called the Guide Patrol. But my time in the Guide Patrol was more than a transition between Cubs and Scouts; it was also a time of transition of the Scouting program at the Church level.
Now, trying to change an entrenched Scout culture is not a simple thing. But looking back, I can see a trend developing among the Church leaders. Primary and Jr. Sunday School were staples of the pre-youth group. But little doctrine was taught there. The Church could see that the youth needed to be better prepared for the challenges that would face them so they gradually changed the emphasis of Primary.