There is no war, just tentions. Surely as a rheinlander you should know that.
I'd hate activity of good people to go to a waste. New clan may boom in first weeks and then die out slowly. I would still advise you to try and jump into RM. They are an old, trusted factions that seen a lot.
Edit: Also to point out. Rheinland could not win a war, neither could Liberty until a mod is launched that would reflect the new situation. Modders decide what changes are made, whos winning and whos holding ground (see Kusari-Bretonian war). Our tiny battle play little part in how Sirius universe evolved. This, however, makes the importance of winning battles even lesser.