One of my favourite tinnies���. The �Brigade Aufmarsch 45 , 24 Juni 1934 �. This meeting was a few days before the Night of the long knives. The SA was on top of it�s power. They became a threat to the NSDAP. In the weekend of the Night of the long knives , most of the SA topmen were killed by the NSDAP.
As far as I know a brigade is a very large military unit, the SA were not the soldiers of the nation ( that was the Wehrmacht) , but they used the term � brigade�.