Sorry if I missed this - do fleets have to buy 3 (one of each)objective cards at the start of the campaign, or is there a generic pool of objectives you draw from for the locations you fight in that have a +X objective cards trait?

Your fleet is constructed with 3 Objectives as per normal. IE, one of each Colour. (And of course, there is no cost involved with them, again, as normal ).

When you see +X objectives, you as second player, choose that many of them to go into the pool to be chosen from. Typically, this is in addition to a Campaign specific objective of course.

Also when you say "buy" let me mention the points in the corner of an objective are not fleet build points to pay, all objectives are free. The corner tells you how much victory points each voctory token generates.

I played like 5 games never using outpost before i noticed...

6 hours ago, Drasnighta said:

When you see +X objectives, you as second player, choose that many of them to go into the pool to be chosen from. Typically, this is in addition to a Campaign specific objective of course.

You choose X out of the three objectives that you selected for your fleet at the beginning of the campaign (or when the fleet was replaced).

Just to avoid any possible ambiguity with "them" in "choose that many of them." While it's clear to me, some could think that it means "of all of the objectives in the game," given some of the recent rules questions.