I was around in the early stages of the war, from what I recall...
1. Rheinland exposed Liberty nom research, aggregating the government.
2. Liberty attempted to steal Rheinland's own research and annexed planet Atka, a planet in Hudson both Houses wanted.
3. In doing so, they violated the agreement that prohibited houses from deploying significant number of military ships into border worlds.
4. Liberty declared war
5. Rheinland fights DEFENSIVE war ever since (dont let the Texasburg fool ya) since they were smaller than Liberty.
And yes, I could blame your faction just like that. Makes about as much sense as you claiming Rheinland threats without giving any evidence of.