Some weeks ago I touched upon the story of Johann Jacob Bach and his service in the Swedish army. It was originally my intention to publish an article on the subject in some suitable journal, but other subjects have a tendency of getting in the way. So I'll do it here instead.
One of the versions is that Bach joined the Swedish army in 1704, another that he did so in 1707. Let us start with the first one. What happened in 1704? Well, a few new dragoon regiments were recruited, one of the them under the command of Gustaf Adam Taube. So let's check the oldest muster rolls for 1704-1705 for the regiment's hautboists. And there he is as no 1: Johann Jacob Pach (Generalmönsterrullor, Arkiv med löpande volymnumrering, SE/KrA/0023/0/1603 (1704), bildid: A0029803_00009).
Despite the spelling there is no question about the identity as Bach also turns up in the records from Bender as hautboist from the Taube dragoons, in one case even with his own signature.