Heey, today I played NTW and my idea was to conquer Europe. This was really easy:
I played as the kingdom of Italy, I started first to conquer the italian states (papal states, napels etc). After that I was part of the coalition, that pretty suprised me, because I was first an ally of France

I started a war against France, first; the Southern French provinces (provence etc): No French armies! WTF! All their armies were in Germany, lol

After taking the Southern provinces, I buyed Belgium from Prussia. I maked many armies in Belgium and conquered the last parts of France. Yeah, Napoleon was gone.
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Suddenly Austria started a war with Russia, Prussia, GB and Me! Dmn traitors
So I conquered Austria xD. At that moment I didn't knew what to do, there were only allies... So I builded trade-stuff, sended ships to Africa and maked a lot of money! Spain wasn't very happy about this, so they started a war against me. *Sigh* Another one...
In a few turns, Spain was gone > I conquered them

Portugal didn't liked that I conquered there little friend, so Portugal was going to be also part of the great Italian Empire!
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After a few turns of peace, I started a war against Prussia. I didn't know what to do so I betrayed my friend

It was pretty easy, first I conquered a few regions without a Prussian army. Then I buyed the other regions in return for peace (ahem, the next turn I attacked Berlin

). Ok that was the fall of Prussia, next: Russia. OMG how easy. With a full army I attacked Moscow directly, BAM the fall of Moscow. Russia feld in two parts: North and South with as capital Saint Petersburg. I did the same with the Russians as I did with the Prussians. I buyed the regions in return for peace and attacked Saint Petersburg, the fall of Russia.
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Next, the fall of scandinavia. Send a few armies and that's it, really easy! At that moment there were three factions; me, the Ottomans (ally) and GB (ally). Yeah, two allies. I had to betray the ottomans first because they were master of the trading ports in the Egypt/Turkey area. And I wanted to collect every port

So, I did the same as what I did with Prussia and Russia. At that moment I had to begin a war against England. First I conquered London and buyed Schotland and Ireland. All armies were in Wales, OMG four full English armies

No problem for me, just send a few armies to the North of Wales to lead away the brittish armies. With a other army I conquered Wales and Europe was MINE!
Tips:
- Lead armies away when many armies are round their capital
- Keep sending trade ships to the trading ports in the South and North
- Use the buy-and-betray-method; the thing I did with the major nations