• We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
Not to build a naval base. To activate it in the supply network. A bit different. That is probably why the AI 'never' builds a naval base on its own. And why their navies is such at a dismay when sent off range.

I remember playing a recent game where it was 1905 and I tag switch to England. They were only just then researching the tech to build naval bases. I thought it absurd that the worlds naval superpower was incapable of naval bases.
 
Sorry for the thread necromancy, but I need to know, what does "no valid target" mean? I'm playing as Austria and I can't assimilate Turkish pops. What do?