the board is all there is. You have to buy the planetstrike mission book seperatly if you want the scenarios. All the planetstrike ruleset gives you is a map with a couple of special terrain pieces on it which affect how you move around the map - nothing more. There is no campaign or set of missions attached to it & frankly the Crusade of Frie "campaign book" is a complete rip-off at $50.
Use the planetary empire tileset to keep track of battles won & lost over a season of games within your group, or track the progress of a large (or small) campaign... However be aware thath you need to bring your own campaign ideas.
Having a campaign map to fight over where progress is measured actually has a pretty good effect on bringing people back to ensure they don't look poor in comparison. My group does up a map & everybody gets a set amount of flags - in the beginning players challenge each other & fight over unclaimed tiles, the winner gains the tile; once the map is full a challenge results in the winner replacing the loser's flag on a tile. We paint the tiles up differently to be things like moonscapes, forests & cities; then when we play our games we let the tile we're fighting over dictate how we set up terrain and if/when we utilize any of the "warzone traits" from the rulebook. It's quite fun & serves to break up the monotony of playing game after game of Vanguard Strike - The Scouring (seem to roll this mission all the time) Of course, we bring that to the table, the tileset only brings a way to keep track of things - you can do the same thing with a hand-drawn map & a set of different coloured pins (this would cost you maybe 99C for a hundred pins of any given colour)