Belgium's Leopold II invades the Netherlands

According to some recently posted articles Belgium's King Leopold II had plans to invade the Netherlands when he was still Crown Prince.
So lets say he would go ahead with his initial plans, or he would succeed his father at an earlier age, and launch an attack on the Netherlands somewhere between 1855 and 1909, what would be the most likely results of such a campaign, how would it alter history?

Article one

Article two
 
Leopolds plans was baised on two wrong conceptions:

First: invading the Netherlands from the south is easy. Ask Montgomery or Louis XIV about that. It isn't, you have al the major rivers you have to cross.

Second: the catholic south will rebel. It won't. Catholics had the same rights as protestants and were a major influence in Dutch politics. Flemish people in Belgium were a second rate citizen, so it was better to be a Dutch speaking catholic in the Netherlands than a Dutch speaking catholic in Belgium.

Those two reasons were of course the reason Napoleon III told Leopold not to do it.
If Leopold did it anyway he will probably deafeat the Dutch army at first, which retreats and manage to defend the rivers, worst case scenario the Dutch army retreats behind the waterline, slowly rearming and having complete domination of the seas (well, at least over Belgium, Antwerp will be closed again). The Belgians meanwhile have to occupy the southern Netherlands.

At some point foreign powers will get involved. The British will not support the Beglians (which just renounced their neutrality btw), the Prussians proabably will support the Dutch (I suspect that the Belgians are too close to the French for their likings).
 
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