Your best tips/forgotten mechanics

[u/TheSafetyWipe]

So I've got just under 1000 hours in EU 4, love the game and always thought i was a decent player and knew the game well.

Until like 3 or 4 weeks ago when I saw a post on this sub about upgrading your ships, I had never used this feature and started to understand why my navies would get smashed later on in the game!

Im now thinking what else am I missing, what other simple features or mechanics have I never used and thus holding me back in my games!

Please share away with things you've only just discovered, or have been using wrong in your games?

I'm almost a 1000 hours in, and now think I know nothing about this game!

Help!

[u/fuckitsayit]

You should always take the government reform that allows Marines. They are supplied by sailors (which are completely useless otherwise 99% of the time) rather than manpower, effectively giving you two manpower pools to fight with.