It does and the AI is not too terrible actually. Admittedly, PA has near zero micro and is more about sending unitblobs at the enemy than controlling individual units.
So you have skirmish, where you can customise the AIs, the teams, the system layout etc.
And then you have a campaign. There is no storyline, just a galactic map with systems controlled by the enemy AIs, and every system battle is basically a skirmish with limited unit unlocks, as you need to unlock some units throughout the campaign.