This is a new diplomatic action, where you can ask other nations for their map of a certain region.
New mission system makes it easier to send your fleets to a region, and expect them to survive.
North African Muslim states can raid the coastlines of their neighbors for gold and sailors.
Merchant republics can recruit minor nations into their Trade League for common defense and, more importantly, common riches.
Nations can rent their armies out to fight in other people’s wars, earning valuable coin for the realm.