Hello Dan,
I\'d like to welcome you to sweetwater.

I\'m the resident American here and only native speaker that I\'m aware of.The gentlemen on this site are very kind and have always been very gracious to me in regards to my postings in English.It works very well as I don\'t need to expose them to my horrible spelling and grammar in regards to writing German.Besides,most of them write better English then I do German anyways.
From what you listed I do happen to play American Civil War in 15mm using the Fire and Fury rules system.I own both Union and Confederates, although I have a preference for the rebels.
I don\'t have 6mm WWII,but I do have FOW in 15mm.We are currently running a campaign at our club,(Bamberg)but it is a flexible one that allows players to jump in as the please.At our club we play the period and not the politics and therefore if you want you can join us if your in the mood for modern warfare.Only thing is that you live quite a long distance from us about 3 hours by car,but much quicker by train.
I\'m in the process of building up a DBA/DBMM Norman army that can also switch hit for FOG and so I can also play this.I have plans to add Vikings and Samurai as some point.
I\'m an avid WAB player with several armies.This is a set of rules you should look into,because you live near Munich and their is a pretty decent sized Following there.Talk to Ghibelline or Leondegrande.
I also play British Grenadier American War of Independece in which I\'m building an American army at the moment.
Anyways,whatever you decide to do I welcome you to the forum and the wargaming community in Germany.
Cheers
Christopher