Protestant flag

[kIndal]

I am making a great updated of my 30 years war and I have an important doubt. I don´t really know what flag use to the Protestants .(I think that it´s a typical problem in all the scenarios about the XVI and XVII centuries). I have thought some posibilities: Saxony, Branderburg or Bohemia, but I don´t decide for anyone, so ask for your help.
Well, if the Evangelical Union have an own flag i will put it, but i don´t know if they had one (German civadicts do you know it? )

Too, if you want to say me your comments about the old version you can do it here: http://apolyton.net/forums/Forum49/HTML/000038.html?11

[Henrik]

I am using the brandenburg glag in my scenario.
Are the transylvanians going to be counted as Ottomans (as they are the sultans vassals) or as protestants (since they where protestant)?