Originally Posted by Blodrast
I'm sure the GH can train additional warriors. You can probably check this relatively easy if you start the game with "-ian" and then switch to GH.
"Tax imports" ? AFAIK, you can't tax imports. You only make money from exports. You make no money from what other people export to your provinces, only from what you export in theirs.
And for that you need a port and a trade building, yes; the province you're exporting to needs a port as well (but no trade building), and it must not already have that specific trade good (i.e., you can't export silk to a province that produces silk).