The Netherlands and those other countries are too small.

This has been suggested before, and it had got some negative reviews.
What shots these suggestions down is, as stated above, the small dimensions of the AI countries in comparison with the actual playable countries, referring, in this case, to the number of provinces.
Indeed, there are countries with like 14 provinces which somehow could be played as(for example, Lithuania in the 100 Players Map), but in most Call Of War maps, the playable countries nearly always have an AI country next to each of them, which they can annex easily in the early days of the game.
It's about keeping an stability on the map in the early days.

it would be nice to play as belgians for once and not the same old countrys as always

Well, I just learned the meaning of a new word today: "pantophobic," meaning the fear of everything. From the Greek "pantos," meaning everything. Yes, it's apparently a real condition.

Anyway, the reasons why actual small European countries like the Netherlands, Belgium, Denmark, Latvia, Estonia, Lithuania, Switzerland and Austria are not playable are simple: (1) Given their small population, they have absolutely no chance whatsoever of winning the game under any circumstances. None, zero, nil, nada, zip, ain't happening. (2) Given the impossibility of winning, very few persons have any interest in playing these countries, and as a practical matter, the software developers have very little interest in spending the time, money and resources to make the software changes to permit persons to play these small countries that virtually no-one will ever play.

I hope that answers your question. Cheers.

Norway would be awesome. More action in Scandinavia!

On the 25 player map it could be done - though it would be the hardest country to play as, due to the core-non core resource mechanics

(and most other countries are challenging enough as they are, resourcewise)

I didn't feel compelled to outline the details, but yours is a nice, very succinct summary of why this will not happen given the existing game dynamics.

Of course, you're explaining this to a new player in his first game. You may want to elaborate on your explanation of the importance of resources, as well as the game dynamics of core vs. non-core returns on resource provinces.

Bicycles were used to great effect by most nations during the war. They are much cheaper than cars and are well known for 'winning' japan's war in the pacific at the start. the problem with bicycles is there is no reverse, so they were unpopular in france and the lowlands.

Sorry, I have a habit of assuming people actually read the forums for some more indepth knowledge regarding how this game works.

Tomorrow I turn 37 and I still feel I need to adjust that younger people have the attention span of 160 characters;)

(Assuming OP is younger than me, but you get my point I hope)

It's all a matter of perspective, my friend. From mine, you are the "younger people." As you get [even] older, you may come to appreciate that the "smarter" persons among us are always simultaneously both student and teacher.

Guys, get back on topic. We were talking about adding the Netherlands. If we were to make this possible, we should call the land Benelux containing all 3 countries, but still it would be at a disadvantage.

The OP says Netherlands. Your idea however, is a fine one

you could always make the neatherlands territory (in the Pacific core to them..... you... it almost has enough land... you could also give it extra morale in those lands

Why not make them all as 1 country Netherlands, Belgium, and Luxembourg