Simplify the following text for a Grade 2 native English-speaking person.
Original: While Hitler was in prison , RÃ hm helped to create the Frontbann as a legal alternative to the then-outlawed SA . At Landsberg prison in April 1924 , RÃ hm had also been given full powers by Hitler to rebuild the SA in any way he saw fit .
Simplified: Hitler made RÃ hm the leader of the SA .