can you do free actions if the main action was Retrieve Vassals?
I know that Placing a Tile won't be possible because that would require you to place a Vassal and that's a Mandatory Action and you can only do 1 Mandatory action per turn, but what about:
Advancing a Dragonrider on an Exploration Tile? Or Using a Dragons Special Ability? Can we do these Free actions when our Mandatory Action was Retrieve Vassals?
Of course you can!